The Wall Around the World

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When neighbors from another continent get too noisy.

All around where you grew up is a barrier. No one knows what lies on the other side. Or if they do, they're not telling. It could be Here There Be Dragons, or your ancient enemies, or it could be that you and everyone you know is Sealed Good in a Can (or evil, who knows?). Passage through will be difficult if not impossible, for what good is a barrier if anyone can walk on through?

The wall can surround a single village, a town, a continent, a world, or even an entire galaxy. Or it could seemingly surround nothing, and simply mark a barrier between one world and the next. Surprisingly common in Soviet era SF. Think about it.

Note that, despite the name, the barrier does not have to be a literal wall. But if it is, it is almost always a Great Wall.

Compare Dyson Sphere, which is a wall built by the inhabitants of the world. If the barrier surrounds a community, it is an isolated Small Secluded World or City in a Bottle or possibly a Domed Hometown.

Examples of The Wall Around the World include:

Anime and Manga

• The wall around the town in Haibane Renmei. (We never do find out what lies beyond, though, considering that the walls are death...)
• In the first and second seasons of Slayers, the world Lina could explore (and put craters into) was restricted by a magical barrier that went down after the Big Bad powering it was killed.
• The wall in Princess Tutu is both literal and metaphorical, keeping reality from intervening in the narrative-controlled Gold Crown Town. Most people don't even realize it exists, since the story prevents them from wanting to leave. (This doesn't stop people from suddenly appearing inside the town gates, but it's ambiguous whether they're capable of leaving.)
• Tengen Toppa Gurren Lagann has the human villages deep underground. The planet's surface is overrun with monsters, and humanity has hidden away for so long that most of the people in Kamina's village question whether the surface actually exists.
• In the one-shot manga Island, by Komi Naoshi, the town the main characters live in is surrounded by a huge wall, much like a well. When the islanders turn 14, they are shown the truth: outside their island is nothing but a vast sea. The islanders believe that all the land in the world sunk and thus all other countries were drowned, making it useless to go outside the island. It turns out that only the island sank, probably because of land subsidence and earthquakes.
• Tokyo Jupiter in RahXephon, encasing Tokyo (and looking like Jupiter).
• A variety occurs in Angel Beats!. There's no literal wall, but the world around the high school complex just disappears into a thick fog once you travel beyond the hills.
• One Piece:
  • Okay, you are a pirate, and your dream is to find the legendary treasure of Gold Roger, which he hid somewhere on the Grand Line (an ocean route that circles the whole world at the equator); find it, and you will (you assume) be rich beyond your wildest dreams! Well your second problem (the first being that you are a greedy fool who has no idea the danger you are getting yourself into) is getting to the Grand Line, and that ain't easy:
    • First of all, the Grand Line is bordered by the Calm Belts, a barrier that makes approach from the North or South almost impossible. The Calm Belts have no wind or currents, so a sailed vessel trying to cross one would be paralyzed. Try to reach it this way and you and your crew will likely perish from starvation or thirst before even getting a few nautical miles in. Ships that are propelled with oars, steam engines or some other self propulsion system can theoretically cross, but the Calm Belts are also home to marauding tribes of Sea Kings, monsters who are territorial, xenophobic, and very unfriendly.
    • Or, you could try to reach the Grand Line via the Reverse Mountain which is on one side of the world on the Red Line - this will also lead to your doom, it's just much quicker here. There are four routs to get here, one from each of the Blues; taking this route from any of them requires maneuvering your craft up violent rapids that flow upward to the mountain's peak, and assuming you manage that, down even worse rapids and then down a fifth route that lead to the Grand Line proper. Only a master navigator with near supernatural insight (like Nami) and the same amount of luck (like the rest of the Straw Hats) could manage this feat, most every other ship is dashed to pieces with their crew experiencing screaming freezing watery deaths.
    • Of course, if you're truly serious about getting to the Grand Line, you could try joining the Marines. Their ships are not only self propelled, their hulls are coated with sea stone, which make them invisible to the Sea Kings. They have in fact built many strongholds and cities in the Grand Line, and even a few in the Calm Belt, such as Impel Down (the reason that place has a reputation of an escape proof prison). Of course, working for World Government has many other problems.
  • Another barrier in this world's admittedly strange geography is the aforementioned Red Line. A polar opposite of the Grand Line, this ring-like continent also circles the world, but in this case north to south along the meridians, separating the East and West Blues. The center of this ring is dominated by impossibly tall mountains, making travel from one hemisphere of the world to the other nearly impossible. And don't try digging under them or blasting through, because the odd red stone (where its name comes from naturally) is indestructible (not even someone with the Nikyu Nikyu no Mi devil fruit power, which can repel any object at the speed of light, can not crack it) and this rock extends 1,000 meters deep from the surface to Fish Man Island at the ocean floor. There are a few well-known ways to pass, but none are easy. Again, the Reverse Mountain can be used (using one of the four routes up from one of the Blues and then down another) but doing so is no easier than using it to get to the Grand line. Also, if you have permission from the World Government, you could cross at Mary Geoise, their capital city which is on the opposite side of the world from Reverse Mountain; unfortunately, this is not a sea route, so if you crossed the Red Line in this manner, you would need to procure a second ship on the other side. Finally if your ship is coated with resin from the Yarukimian Mangroves, it can submerge and descend to Fish Man Island, where there's a huge tunnel that allows passage. Of course, actually doing this requires befriending or hiring someone who can coat your ship, and only two shipwrights - Den (himself a fish man) and Silvers Rayleigh himself - know the difficult and expensive process.
  • But nobody, not even the Marines, would be able to cross both barriers at once, which is why One Piece is so difficult to find. While Laugh Tale (where One Piece presumably is) is located only a few dozen miles west ("as the crow flies", so to speak) of the Reverse Mountain, getting from Reverse Mountain would require crossing over the Red Line, which again, is impossible. Thus, gaining Gol D. Roger's treasure requires circumnavigating the entire globe via the Grand Line, which is much, much more dangerous than getting there in the first place. In fact, given how difficult travel is due to these great barriers, a common fan theory states that One Piece itself is some weapon or technique that can not only defeat the World Government but physically destroy the Red Line, bringing freedom to the people while unshackling the entire world.

Comic Books

• The Incredible Hulk occasionally visited the Keystone Quadrant in his old comic-book series... basically a solar-system (possibly more than one) which was somehow 'walled off' from the rest of the universe, it could only be entered and exited through various types of teleportation. It was basically a Sugar Bowl without the sugar - populated by funny talking animals and hilariously incompetent Keystone Kops... and caught up in a long war between a Mad Scientist tortoise and his cybernetically-enhanced Black Bunny Brigade (not to mention a small army of robotic Monster Clowns), and the heroic Animal Resistance, led by a fast-talking Raccoon space-captain.
• The Source Wall is a wall around the entire DCU, which...well, who fucking knows. It makes no sense. Either 2D Space is in full effect or it lines the entire interior of the universe, in which case the universe it both finite and shaped in a way where that makes sense. Also, there are powerful cosmic beings embedded in the wall, and The Source (which may or may not be God) is on the other side.
  • Early stories that mention the Source Wall (mainly by Jack Kirby himself) suggest that it is not a physical structure, but a metaphysical barrier without a physical form. It wasn't until the first issue of the joint company product Marvel and DC Present that it was shown as a physical wall with the Promethian Giants entombed within; this issue was not canon, but seemed to set the image for the Wall for all future appearances.

Film

• The forest containing The Village is closed off from the outside world by a wall. Turns out there's a reason for that.
• The desert that surrounds the Maitlands's house in Beetlejuice.
• The walls of Truman's enclosed world in The Truman Show.
• The broken bridge in Dellamorte Dellamore, aka Cemetary Man.
• In Dark City, John Murdoch tries to reach Shell Beach; instead he finds a wall at the edge of the city.
• In the film version of Aeon Flux the survivors of the "industrial virus" (biological apocalypse) have lived in the walled city of Brenga for generations. The outer perimeter of the wall is periodically sprayed with some sort of poison to keep the outside world at bay.
• A (probably apocryphal) story about Harlan Ellison's pitch for the first Star Trek film claims that Ellison met with Paramount executives and provided an outline for an epic story which ended with the crew of the Enterprise traveling to the edge of the universe, encountering a massive wall there, blasting a hole through it with their phasers, and seeing the eye of God staring back at them. Studio heads, however, were unimpressed, claiming that the premise wasn't "big enough", at which point Ellison stormed out of the meeting.
• In The Last Starfighter, the entire civilized-good-guys portion of the galaxy is surrounded by an enormous force field called the Frontier. The evil Ko-Dan Armada lies outside the Frontier, but they've found a way to drill through it. (Cue Musical Sting.)
• In The Thirteenth Floor the world has no physical wall around it but it does have an edge where the simulated nature is visible to the naked eye. People with in the simulated world are just programmed to never think about going anywhere near that edge (of course there are exceptions...)

Literature

• The Trope Namer is a short story by Theodore R. Cogswell in which it separated a magic-dominated half of the world with a science-dominated one.
• The one located in the town of Wall in Neil Gaiman's Stardust.
• In The Sword of Truth / Legend of the Seeker, there is a (almost impenetrable) great barrier around a region called "The Midlands", which is the central geography of the story.
  • That barrier is also re-used in Naked Empire of the same series, to close off a group of people from the rest of the world.
• There's one of these in Garth Nix's Old Kingdom books, separating the nonmagical land of Ancelstierre from the Old Kingdom, where there's necromancy and other magic. It's actually an artefact containing one of the five Cosmic Keystones that keeps the Charter together and is designed to keep anything nasty inside the Old Kingdom where people know how to deal with it. It's only moderately successful, hence the massive trench and bunker network on the Ancelstierran side.
• Ian McDonald's Out on Blue Six—the city is surrounded by a giant Wall, and the protagonists explore to see what's on the other side. Turns out--nothing but toxic waste.
• In Damon Knight's Hell's Pavement, people in Connecticut (200 years in the future) know nothing of the people in New York, who know nothing of the people in Ohio, and so on. They believe people in the other places are literally monstrous and inhuman. (There are walls between zones.) This happened because supermarket chains used brilliant new brainwashing techniques to make people totally loyal to their brands, and the adherents of different brands formed different zones.
• The planet Krikkit in The Hitchhiker's Guide to the Galaxy was surrounded by a thick fog such that they never saw outside their world. This was done by the remnants of the supercomputer Hactar, making the Krikkiters into an Omnicidal Maniac race once they saw the universe. He did this so they would use the universe-destroying bomb he had invented, thus fulfilling a duty he welched on long ago and getting rid of his long-standing guilt.
  • In So Long and Thanks for All the Fish, Wonko the Sane builds an inside-out house he calls "the Asylum" to fence in the rest of the world (he, naturally, lives "outside the Asylum", which is inside the house). He'd decided the entire world had gone insane when he came upon a pack of toothpicks with instructions.
• In the novel Hard-Boiled Wonderland and the End of the World, the End of the World sections take place in a town which has a wall around it, and once you come to the town you can't go outside the wall.
• If you only follow the first book, Oz would seem rather like this. The endless deadly desert surrounds Oz on all sides, isolating it rather nicely. Too bad later books place other magical kingdoms on the other side of a desert that seems rather more like a moat. Eventually, all the magic-users in Oz gather their power to put a wall of invisibility, thus more permanently sealing off Oz.
• There's a short story by Arthur C. Clarke called "The Wall of Darkness" about a planet with a wall that divides it in half. The protagonist attempts to climb the wall too what's on the other side. turns out there is no other side, and the planet is essentially a 3D moebius strip, and so only has one side
• The Void in Peter F. Hamilton's Void Trilogy, arguably.
• A global glacier surrounds the only habitable continent on all of Darkover, literally called The Wall Around the World by the inhabitants.
• In The Singer of All Songs, the order of priestesses known as the Daughters of Taris live surrounded by a giant wall of ice. They are the only people who can use ice magic, so they control who can come in and out.
• The great Agatean Wall in Interesting Times is more to keep everyone inside, rather than other people out. According to the leaders, there is nothing but ghost and vampire-filled wasteland outside it.
• In the Dosadi Experiment the whole eponymous planet is encased inside "God Wall" barrier as a part of said experiment. Not that it's completely impassable, but for most people inside it is.
• The Land of Elyon, a children's series by Patrick Carman, has walls surrounding the inhabited cities and the roads that link them. The main character finds a way out of the walls, despite the fear of many of the other characters about what is beyond the walls.
• The Green Wall in Yevgeni Zamyatin's We, separating the civilization of the One State from the forests around it, which in turn separate them from the rest of the world. We are given few and conflicting clues as to what actually may exist beyond the forest.
• Ted Chiang's "Tower of Babylon" is a speculative fiction short story where it's more of a ceiling or floor. The vault of heaven is a literal stone roof to the universe, and the Babylonians have built a tower to talk to God, who they believe resides above it. One of them makes it, only to emerge from a cavern deep in the Earth, back where he started--somewhat similar to the Clarke example above, the world loops back on itself.
• Marlen Haushofer's "The Wall" is about a woman one day waking up in a mountain valley with the whole valley suddenly surrounded by an invisible, impenetrable wall. With all life outside the wall apparently dead, the book deals with her trying to survive inside the valley. Wondering if she is the last human alive, she speculates about the origin of the wall, which in the end is never revealed. She often thinks about trying to leave the valley, but never can't bring herself to risk it. What happens with her in the end is left open to the reader.
• Perry Rhodan uses this on a number of occasions (including a 'wall' around the entire Milky Way Galaxy that the protagonists had to deal with after losing a few hundred years in an unexpected stasis field while outside, once). There's also a more literal example in Wardall, a tide-locked planet with a wall running around its entire circumference following the terminator. The planet's former natives apparently lived inside said wall rather than on either side of it, not surprising considering the conditions there; by the time the issue set on the world opens, though, its only inhabitants are the surviving crew members of a crashed pirate vessel and their descendants.
• The wall separating Experiment House property from Narnia in The Silver Chair.
• A literal example is the spherical Walls of the World from JRR Tolkien's legendarium, which are only specifically described in The History of Middle Earth although their existence is implied in The Silmarillion. The walls separate the world from the empty void of the Outer Dark, and are only pierced by a single Door of Night, created by the Valar to thrust Morgoth out until The End of the World as We Know It.
• A large portion of the plot in Orson Scott Card's Pathfinder revolves around one of these. It's revealed decently early on that there are actually 19 "worlds" with Walls.
• The world of Ethshar is a Flat World, being the end-cap of a cylinder. The edge of the end-cap is marked by a "noxious yellow gas".
• David Eddings's Belgariad-verse has the Eastern Escarpment, a mile high sheer basalt cliff that acts as a natural barrier between some of the Kingdoms of the West and the Angarak kingdoms to the east.
• In the Land of Oz books, the eponymous fantasy land is separated from the rest of the world by a desert that surrounds it completely. In the first two books it is described as a typical desert, but in the third onward, it is supposedly incredibly hostile to life, with a poisonous atmosphere and cursed sands that will cause a living being to be reduced to dust if they so much as touch it. Not that it is a reliable barrier, though, as several books involve someone reaching Oz by flying over it, tunneling under it, or using some sort of magic item to protect themselves.

Live Action TV

• The barrier around the galaxy in the Star Trek: The Original Series episode "Where No Man Has Gone Before".
  • Another old series show, "For the World Is Hollow and I Have Touched the Sky", where the world is a hollow asteroid.
• In the Doctor Who story "Inferno", the Doctor pushes through a barrier in time and ends up in a Mirror Universe.
  • Also used in the DWM comics, most notably in "Oblivion".

Myth, Religion, and Legend

• Jericho, from The Bible, is now synonymous with its absurdly strong fortifications. Tends to happen when it takes God Himself to bring them down.
  • There is also reference to a the sky being a firmament, a literal wall around the entire world.
    • Prior to the Flood. It pretty much fell down then.
• A pre-Islamic Turkic myth has the Turkic people fleeing into a valley surrounded by mountains of iron to survive an onslaught. Their point of entry collapses, effectively sealing them from their enemies and letting them stay there for generations. When they decide to leave, they do so by melting the iron mountain.

Tabletop Games

• The borders between the physical realm and the spirit worlds in the Old World of Darkness RPG line (the Gauntlet and the Shroud) qualify. Most humans have no idea that the spirit realms are real.
  • The Gauntlet still stands in the New World of Darkness, cutting off the Shadow from the material. There's also the Abyss, which severs the Supernal from the Fallen.
• Dungeons & Dragons, as always:
  • The Misty Border in the Ravenloft setting cuts it off from the rest of the multiverse. You can check in, but you never check out. Darklords can do this at will (with few thematically-appropriate exceptions) to isolate their own domains.
    • The town of Barovia has its own permanent version of its domain's closed border; only the Vistani know how to make a secret antidote that allows safe passage.
  • Spelljammer has a borderline case: crystal shells. Oh, it can have many thousands of portals... spread over the whole surface of a star system, that is. It's not easy to find one without knowing where it is, and they don't always stand still forever. Thus the proper magic is the best way to locate a portal or even open temporary one—for those who have it.
  • However, Athas, the world of the Dark Sun setting, seems cut off from the rest of the Dungeons & Dragons universe. The most the Spelljammer setting would say about it was that "Athasspace" was "not on the spacelanes", but hints that there might be some way to get there. Planescape mentions it a few times, hinting it's possible to go there via portals in Sigil. It's likely TSR wanted to discourage players from traveling from, say, Oerth to a low-magic world where slavery is not considered evil and both iron and water (two materials considered priceless on Athas) are common; such could be a disaster waiting to happen.
  • The same can be said of Eberron (from the setting of the same name), and Cerilia (or the Birthright setting). It is hinted that it might be possible to go there from other settings, but various game mechanics make such a transfer unfeasible.
  • In Planescape proper, each Outer Plane is infinite in size. This supposedly includes the Outlands, even though there is a finite distance from the Spire to each Gate Town; a Gate Town is a community that metaphysically closest to one of the Outer Planes on the Great Wheel. But what exists beyond the Gate Towns? Anyone who tries to find out enters an area referred to as the Hinterlands. This wildreness is much like the terrain surrounding the gate Town that a traveler passed by to get there - for example, a traveler going past Ribcage would find broken wastelands and hills - but no inhabited towns or settlements. There is also a strange spatial effect in the Hinterlands; you could travel past Ribcage and then for years in the same direction, but if you decided to turn around and go back, you would reach Ribcage again within an hour, and even if you made a specific attempt to remember something you encountered in the Hinterlands, you would never find it again if you attempted a return trip. There are rumors of expeditions into the Hinterlands finding strange landscapes, ruined cities (always with no clue whatsoever to the identities of whoever built them) and other interesting things, but this odd effect prevents these claims from ever being confirmed.
• The Weirding Wall in Nobilis which encloses the whole universe.
• Paranoia is set in Alpha Complex, a domed city. The existence of "Outdoors Sector" is acknowledged, but information about it is limited, especially at low security clearances.

Video Games

• Custom Robo (the Gamecube version) has the humans live inside a domed city that isolates them from the post-apocalyptic world. The outside world is kept secret except to a select few. But when you beat Rahu III, the final boss, it is revealed to everyone.
• In Grandia, an entire continent was divided by an enormous wall about a mile high. No one ever tried to explain why.
  • Could have something to do with Gaia killing almost everything in it's path, as it's only encountered on that side of the wall until it got on an airship.
  • Grandia II had something similar, a huge nigh-uncrossable canyon, though its existence was explained: it was basically caused by God crashing into the earth.
• In Wild ARMs 4, your first indication that Ciel is not a typical RPG hamlet is when fighter craft shatter the barrier surrounding it that was disguised as sky. The outside world is quite a bit different.
• City of Heroes has the War Walls, justified as barrier against alien invasion, but really there as a level separation.
• Palm Brinks in Dark Cloud 2 was sealed off from the rest of the world via a titanic wall, far too tall to scale. This was done by the Mayor, to protect the citizens from the incredible devastation taking place in the outside world—but now that the land is healing (and with the heroes having escaped via an underground sewer/aqueduct,) many of Palm Brink's inhabitants dream of exploring and building new cities.
• Star Control 2 has slave shields—barriers around homeworlds of defeated races who don't want to fight on Ur-Quan side.
• The Legend of Zelda: Wind Waker: The Great Sea has no physical barrier to keep you from leaving the map. However, your boat tells you that it's dangerous to leave and turns you around.
  • The Legend of Zelda: Skyward Sword has an impenetrable cloud cover that separates the residents of Skyloft from the surface. As far as the people of Skyloft are concerned, the "surface" is a mythical place, rumored to be filled with monsters.
• Gensokyo, the setting of the Touhou games, is walled off from the Outside World by the Great Hakurei Barrier to preserve Youkai, though people and objects occasionally slip through (particularly things the outside world has stopped believing in).
• There's no actual wall on Hillys in Beyond Good and Evil, but if the player strays too close to the edge of the map, a series of pillars will rise up out of the water and warn the player that they're leaving territorial waters. Trying to get past them will just lead to them shooting non-lethal lasers at the player's vehicle to turn it around.

Web Comics

• The area known as The States in White Noise is surrounded by a gigantic wall and poison gas filled moat. No one is allowed in or out except for bounty hunters, and residents hate and fear those who live beyond it.
• In Sluggy Freelance the "Punyverse" turned out to be surrounded by a giant solid sphere, the inhabitants mostly didn't know that and thought it was an endless void inhabited by "void ghosts" that occasionally attacked (it was really wild shots reflecting off the sphere). Also their entire universe was artificial

Web Original

• The Backrooms, a Creepypasta blog that originated on 4chan, are reached by “no-clipping” out of the real world. (No-clipping being a video game term for when the players’ sprites somehow go outside the bounds of the game’s area, the Backrooms being a RPG Mechanics Verse), usually by accident, but many try to do it intentionally. In effect, people end up in the Backrooms by finding their way through the Wall Around Reality itself. Oh, and should someone wind up doing so by accident, they’d best learn how to do it on purpose fast. Each level of the Backrooms is separated by a similar wall, and while many levels have doorways and portals leading to others, leaving Level 0 (which newcomers always end up in) and finding a safer level requires no-clipping.

Western Animation

• The Simpsons split the school into the clean, cutesy "girls" side and the rough, rowdy "boys" side.
  • Also, the glass dome enclosing Springfield in The Movie.
  • And the wall made of garbage separating Springfield from New Springfield.
• In Futurama, the Planet Express crew visits the Edge of the Universe, which has a convenient viewing platform. They are able to look through binoculars at the Universe Next Door, (which is apparently cowboy-themed).

Fry: Wow. So there's an infinite number of parallel universes? Professor Farnsworth: No, just the two.

• In South Park episode "Pinewood Derby", Earth and the Moon are sealed off by a cube-shaped force field after the humans fail the Space Cash Test.
• The Duckman episode Exile in Guyville had a wall being built down the middle of America, dividing the sexes with Women on the East and Men on the West.
• Ba Sing Se, the Earth Kingdom capital in Avatar: The Last Airbender, is surrounded by two giant walls. People within the city are generally encouraged not to even think about the world outside the walls.