Forbidden Zone

"Leela: "Uh, Professor, are we even allowed in the Forbidden Zone?"

Professor Farnsworth: "Why, of course! It's just a name, like the Death Zone or the Zone of No Return. All the Zones have names like that in the Galaxy of Terror.""

- Futurama

In Speculative Fiction, there is always at least one area with a foreboding name that nobody goes to. Ever. Whether it's an impassable swamp, an asteroid field, a city rumored to be haunted, a monster-infested mountain passage or simply a place the elders have declared off limits, this is the place everybody knows you only go to when you're insane.

So, naturally, the heroes will inevitably wind up going there -- whether by choice or circumstance. What good is having something that's mysteriously off limits if we can't go there and see why it's off limits? Chances are the dangers are completely exaggerated anyway, right?

It will either turn out that the Forbidden Zone is indeed incredibly dangerous, or that there's no danger at all, and the heroes were supposed to keep out because it contains forbidden knowledge. In either case, the heroes will pass through more or less unscathed, and they may even figure out a way to make the zone less forbidden.

Compare Forbidden Fruit, Schmuck Bait. The dangerous kind of Forbidden Zone overlaps with Death World.

Not to be confused with Forbidden Zone, which is an awesome Danny Elfman film.

Anime & Manga

 * The Ruins of Old Ostia from Mahou Sensei Negima: a former Floating Continent City that got hit by a massive Anti Magic surge During the War. Now crashed and semi-floating pieces of the city form a massive labyrinth filled with nothing but "Mid-Boss Level" Monsters. Naturally, the bad-guys' HQ.
 * Lost Mountain in Turn a Gundam mixes the "extreme danger" and "forbidden knowledge" variants. The "forbidden" has a very good reason behind it:
 * The Toxic Jungle from Nausicaa of the Valley of The Wind.

Comics

 * In the Sonic the Hedgehog Archie comics, there was the Zone of Silence, which was that continuity's answer to the Void. However, recent events would turn the Zone of Silence into the Special Zone.
 * The Pitt, the fifty-mile wide, fifteen-mile deep crater where Pittsburgh, Pennsylvania once was in The New Universe. Made especially notable due to the mutagen-like "Pitt Juice" and the seven mile-high "Mt. Pittsburgh" volcano.

Film

 * The Zone in STALKER.
 * The Fire Swamp in The Princess Bride.
 * Slightly less dangerous than most; the fire can be dodged by listening for the noise that precedes each burst, the Lightning sand can be avoided by watching your step, and the Rodents of Unusual Size? I don't think they exi--
 * (Interestingly, this last is also a blatant lie, as he had seen one not thirty seconds earlier.)
 * And then there's the Sixth Dimension in the movie Forbidden Zone. It's special.
 * Planet of the Apes prominently features a Forbidden Zone, which contains the important information that
 * It's worth noting the area is actually called "The Forbidden Zone" and is also an inhospitable desert, so there's some practical reason beyond the withholding of scientific information.
 * In the Tim Burton remake, the Forbidden Zone is the
 * In The Lion King, it is strictly forbidden for Simba and Nala to visit the Elephant Graveyard, as that is where the hyenas live.
 * The Intrusion Zone in Enki Bilal's Immortal, formerly known as the Central Park, New York. Apart from causing its surroundings to experience perpetual winter, it instantly kills anything mortal attempting to breach its perimeter. The laws of time and space bend at its core, and it's implied to be the origin of the various nonhumans inhabiting the future New York; at least Jill and John arrived the planet through it.
 * Space Hunter: Adventures in the Forbidden Zone. (In 3-D!)
 * In The Return of Hanuman, the village of Bajrangpur has a Forbidden Zone behind a large wall. Rumors say that there are demons in there, though it's actually an infamous gang's HQ.

Literature
"Tavi: Why don't you send more people?
 * The Dead Marshes and Moria in The Lord of the Rings. Also contains a subversion in that the Fellowship attempts to cross the Pass of Caradhras and is forced to turn back and go through Moria instead.
 * To say nothing of the Valley of Dreadful Death, located in the Mountains of Terror. Only One Man, Beren, has ever passed that way alive... and he doesn't like to talk about it.
 * Subverted in the films, in that Gimli fully expected Moria to be a safe place still populated by dwarves, indicating that most people (or at least most dwarves) don't know that it's become a Forbidden Zone.
 * It Makes Sense in Context. Moria was a Forbidden Zone before Balin's expedition set forth to reclaim and repopulate it. They haven't been heard since and Gimli is just being hopeful, while Gandalf is more pragmatic.
 * The Hall Of Kings in Terry Brook's Shannara series.
 * The Forbidden Forest of Harry Potter.
 * Lampshaded in book six, where, when a centaur becomes a teacher and moves out of the forbidden forest into a specially modified room, someone asks why they don't just have class in the forbidden forest, as nobody's even scared of it anymore.
 * Possibly it was never really this trope, if the name and Hagrid's stories about its dangers are a deliberate ploy by Hogwarts faculty to keep clueless first-years from wandering around in the woods.
 * Although most of the rumored dangers of the forest never materialize, Aragog and his brood are more than enough reason to keep students as far away from the woods as possible. The centaurs, although normally not hostile, can also be extremely dangerous if they feel disrespected.
 * The Wheel of Time features two Forbidden Zones, the Blight and Shadar Logoth, each saturated with evil. Neither is a pleasant place to be. It's a safe bet that anything in the Blight that lives (though "lives" is stretched in some cases) is a deadly threat, and Shadar Logoth is home to the physical manifestation of hate itself.
 * Also, the Ways. You do not want to run into Machin Shin.
 * In Paradise Lost Satan has to pass through the realm of Chaos after leaving the gates of Hell in order to reach Eden. None of the other demons dare to follow, until he comes back triumphant.
 * And that's only because Sin and Death built a safe path through it.
 * The Tower of Regrets in Nemesis, although it doubles as a Call Receival Area.
 * In Dan Abnett's Gaunts Ghosts novel Traitor General, we have the Untill. A swamp which only certain natives can live in. The Ghosts are of course forced to go there to avoid chaos forces.
 * Codex Alera has two:
 * The Wax Forest, which is completely overrun by croach, although the Marat use it for trials and recover a potent medicinal mushroom from it, generally at a rate of one person retrieving it a year.

Doroga: We do."


 * The Feverthorn Jungle is a much more mysterious forbidden zone. All that's really known is that it used to be the stronghold of the first sentient species obliterated by Alerans, and also it kills people
 * In The Last Book in The Universe, the Forbidden Zone (called simply "The Zone" by those who live in Eden) is a minefield which separates the latches (where the normals live) from Eden (where the proovs live). Naturally, the Forbidden Zone is forbidden to normals, but the Zone is not forbidden to proovs.
 * In C. S. Lewis' Space Trilogy, the entire planet Earth qualifies as a Forbidden Zone to the rest of the Solar System, being known as Thulcandra, The Silent Planet.
 * Robert Westall's Futuretrack Five has a Forbidden Zone which covers most of the Scottish Highlands. Ostensibly there to protect endangered wildlife, it's really to conceal the activities of the mysterious Scott-Astbury.
 * In the world of A Song of Ice and Fire there was an ancient empire known as the Valyrian Freehold based off the country of Valyria. Once the most powerful empire in the world thanks to their mastery of magic and dragons, something happened one day that literally destroyed the country, known offhandedly as the Doom of Valyria. Now sailors and explorers fear to even come close to the country's waters as they are storm-wrecked, choking with dangers and the land itself is an inhospitable waste reduced by volcanic eruptions, leading to the proverb that the Doom still rules Valyria.

Live Action TV
"Danielle: Dynamite, by the Black Rock, in the Dark Territory.
 * There is such a zone in the Blakes Seven episode "Pressure Point", surrounding what the Liberator crew thought was Control. . The crew get through it via wire cutters and running fast.
 * Well, shooting at ground level towards their goal with the blasters from Liberator (which are said to be quite powerful) and then running as the wires could self-repair. There's many such "zones" in Blakes Seven, including the Darkling Zone, from where no ship has ever in 300+ years of space travel have ever returned (it's explicitly said to be inhabited by aliens who hate humans), some planets have magnetic fields/shields that fry even Liberator's wiring and after the great war/s in between season 2 and 3 great reefs of debris, bacteriological waste, electromagnatic interference and so forth. Basically you take your life in your own hands leaving Earth in Blakes Seven (especially as there are diseases out there that only affect people who've left their native planets and suffered from "the shakes" which are minute changes in your DNA that are a result of exposure to stellar and interstellar radiations).
 * Lost has the Dark Territory, which seems to be where the Temple is and where the smoke monster hangs out.

Hurley: Well, that's three reasons to go right there."


 * In Star Trek the Original Series, even landing on Talos IV was the only death sentence left on the books. It kinda made sense due to the
 * Farscape has "Tormented Space" which most species stay away from due to dangerous electrostatic anomalies and the barbarism of the natives. Of course, the heroes have to go there to escape the various bad guys.
 * On Stargate SG-1, Teal'c tells Daniel of a world whose address is know to all Jaffa and Go'auld as a place to be avoided at all costs. SG-1 sets out for the place at once. The planet is under Asgard protection and has a device that teleports any Jaffa or Go'auld to a maze that the symbiote cannot escape from.

Magazines

 * A later issue of the National Lampoon had a bizarre story of a reporter's unravelling the account of hayseed comic Junior Samples' attempt to join Frank Sinatra's "Rat Pack". A lead sends him to the defunct "Hee Haw Land" amusement park, which is divided into three zones - Hee Sector, Haw Sector, and the Forbidden Zone.

Tabletop Games

 * From the Dungeons and Dragons Forgotten Realms campaign setting: for the love of the gods, stay away from "The Plaguelands"!
 * Warhammer 40 K has the Eye Of Terror, a Negative Space Wedgie caused by a large chunk of the galaxy permanently overlapping with the setting's equivalent of hell. Not recommended as a holiday destination.

Video Games

 * Misty Island in Jak and Daxter, which is where the entire plot for the game is introduced.
 * The Wasteland and anywhere located outside the walls of Haven City also qualify in Jak 3 and Jak II, respicatively.
 * Many, many dungeons and locations in RPGs and other video games.
 * The game S.T.A.L.K.E.R. takes place entirely in a fictional version of the forbidden zone that surrounds the Chernobyl nuclear power plant.
 * The Real Life example is also acceptable, due to the massive amount of radiation still there. Better yet, anywhere in former USSR is an acceptable trope, if you know your history. (Look at the Aral Sea, for example)
 * S.T.A.L.K.E.R. is said to be inspired by the book Roadside Picnic by the Strugatsky Brothers, which featured such a Zone. There were no monsters there, it was dangerous simply by abundance of things lethal to humans. Still, a lot of people went there for the artifacts.
 * Such hazards and artifacts appear often in the game. The hazards are just as dangerous to the monsters as the player, and the artifacts grant status effects as well as being worth money to merchants.
 * Sectors X, Y, and Z in Star Fox 64. Although many battles take place at these locations, the game's background information reveals that, prior to the war, civilian craft were restricted from going to them, due to the prevalence of pirates and strange radiation that interfered with spaceship functionality.
 * Fridge Logic: Why would there be pirates if there were no civilian craft?
 * That's were pirates would hide when they are not attacking civilian craft.
 * In Half-Life 2, Gordon Freeman arrives at Black Mesa East and is taken on a quick tour, including a boarded-up mine shaft that leads to the city of Ravenholm. "We don't go there anymore," Alyx says. Unsurprisingly, the only other path is soon blocked.
 * The entire northern hemisphere of Twinsun in the first Little Big Adventure is a Forbidden Zone, although some of it is still inhabited.
 * Most horror survival games, such as Resident Evil and Silent Hill are pretty much set entirely within a Forbidden Zone.
 * Geneforge: Two hundred years ago, something went horribly wrong on Sucia Island. Access is punishable by death. Naturally, you're stranded there, and naturally, you're about to find out why it was abandoned.
 * Thief: The Dark Project: The Sealed Section of the Old Quarter. The information Garrett has on it is sketchy (he knows that there was some sort of disaster involving zombies and raging fires 50 years prior to his time, but he doesn't know precisely what happened or why). Having been hired to retrieve an artifact from the quarter's cathedral, he's about to find out.
 * In Immortal Defense the player character actually ends up becoming the cause of a forbidden zone because of his tendency to destroy any ship that approaches his old home.
 * Metroid Fusion has the Restricted Labs, located in the NOC secto-WARNING! NO ENTRY WITHOUT AUTHORIZATION!
 * Sewer Shark's Sector 19. Your boss, Stenchler, explicitly has it off-limits to sewer jockeys, and your copilot Ghost gets irked when Falco shows off video she shot in the tube sections nearby. In a variation on this trope,
 * In the Fallout New Vegas expansion pack Old World Blues, Dr. Mobius harasses and threatens the Think Tank from his dome-shaped... dome... in the Forbidden Zone. It used to be the X-42 robo-warfare facility, from which Mobius creates and unleashes his deadly, intellect-draining robo-scorpions.

Web Comics

 * Inverted in the first Sluggy Freelance parody of Harry Potter, where one of the characters says he's referred to as "Homnigrits, the man who goes where few fear to tread". (The mall, mostly. Not many people fear to go there.)
 * In Beyond the Canopy, the Forest's Navel is a place where nearly all are terrified to go (even the resident Nightmare Fetishist), believing that it's cursed or just a deadly, impassible labyrinth of thorns. The one person who does go there regularly is widely believed to be cursed himself.

Western Animation

 * The Serpent's Pass in Avatar: The Last Airbender. It is a quick route to Ba Sing Se, the only land passage across the large inland sea that separates the sections of the Earth Kingdom, and for those without tickets or passports for the hidden ferry it is the only way to reach the safety of Ba Sing Se. Of course, considering the entrance signpost actually says "Abandon Hope," and only the most desperate of travelers dare to take this deadly route, maybe you should think twice before crossing this isthmus. Hint:
 * The destroyed Fire Nation warship near the Southern Water Tribe village in the first episode straddles the line between Forbidden Zone and Call Receival Area. It was probably forbidden because it had been rent through with ice and was unstable, not because the elders knew of any boobytraps, but the flare Aang and Katara set off summons Zuko to provide a reason to get out of dodge.
 * The cartoon Sonic Sat AM had a Forbidden Zone where a once-evil wizard lived.
 * The short-lived Ruby-Spears animated series known as Piggsburg Pigs featured an area right outside of their city that was literally known as the Forbidden Zone, and for good reason....it was populated by all manner of demonic creatures, from swamp monsters, to vampires, to aliens. Though for some reason, these creatures were more humanoid in appearance, whereas the Piggsburg populous were all anthropormorphic pigs that wore clothes. So whichever one was truly more frightening is left up to you.
 * Obviously Futurama (as seen in the page quote). Also in the episode "A Bicyclops built for two", there was the Forbidden Valley.
 * As it turns out however,.
 * In one of The Simpsons flash forward episodes, a teenage Bart works as a delivery boy for Apu, who tells him he has to deliver groceries to an elderly shut in (Mr Burns) in the "Forbidden Zone". Not the one with the smallpox, or radioactivity, or eternal midnight, but the one with the Uniclams.
 * Basically anything that isn't The Great Valley in The Land Before Time series, following the original (since that was spent getting to The Great Valley).

Real Life

 * For a time in the 1980s the Libyan government declared the Gulf of Sidra off-limits to international shipping, calling their boundary the "Line of Death." Yet oddly, a pair of U.S. aircraft carrier battlegroups encountered no trouble at all when they entered it. The Libyans did send aircraft after them on two occasions, in each case the Libyans getting blown out of the sky by F-14s.
 * Centralia, Pennsylvania. An underground coal fire expected to rage for thousands of years means it's strictly off-limits. This town served as inspiration for the movie version of Silent Hill (see below)
 * Gorge of Despair, in Kings Canyon.
 * Death Valley, California has the distinction of being the hottest place in the Western hemisphere.
 * Which nevertheless doesn't prevent tour buses from going there.
 * You're fine as long as you have air conditioning. Without it though...
 * The Exclusion Zone around Chernobyl in the Ukraine, including parts of Belarus. These days, you can actually go there, but not for long.
 * It's worth noting that hundreds of people work there daily, and their numbers are likely to increase as the new radiation shield needs to be built around the reactor soon. Still, the area is large enough that a casual visitor is unlikely to see anybody else during a brief visit.
 * I think the Ukrainian government recently declared it safe for tourists and a daily visit will now get you about as much radiation as a trans-Atlantic flight.
 * The southern half of Montserrat, a British territory in the Lesser Antilles, has been an Exclusion Zone ever since volcanic activity rendered the region uninhabitable in the mid-90s.
 * During World War I, the space between the enemy trenches on the front lines was called the No Man's Land. It was aptly named. Anyone foolhardy enough to step foot on it would probably be shot by the enemy, up to thousands of times per second, if they didn't step foot on the landmines scattered between and around the barbed wire.
 * Area 51. Assuming it exists, of course.
 * Even the US government has admitted that it does, by now. In hindsight it was probably a bad idea to burn radioactive waste in their backyard without any safety measures.