Ghibli Hills/Literature

Examples of Ghibli Hills in Literature include:

The lushly-described hills of Andelain in the Chronicles of Thomas Covenant are brimming with beauty and niceness. They are not entirely safe from monsters, just enough to give a real nasty surprise when monsters do appear.
Almost everywhere in The Lord of the Rings and The Hobbit, but especially Rhovanion/Wilderland/"The Wild", which as the name suggests lacks much organised government. The appendices explain this is because it was depopulated by plagues and wars.
The Hundred Acre Wood in the Winnie the Pooh books.
Lovingly described in Terry Pratchett's The Wee Free Men. In this, they're actual hills.
In the works of Arthur Machen, nature is home to dark secrets and hidden horrors, such as the Little People and the Great God Pan.
In Gene Stratton Porter's The Song of the Cardinal, the story opens with exalting descriptions of the Limberlost's lushness and fertility with its birds, flowers, berries for the birds to eat, and beasts. Freckles also features it, less centrally, once Freckles Face Your Fears, and A Girl of the Limberlost. It does, however, feature poisonous snakes that can be quite dangerous.
The Golden Country in George Orwell's Nineteen Eighty-Four, only appearing for brief moments within Winston's dreams.