(Author’s note: This is not canon to the actual FNaF story, it just uses some lore bits at some times. FNAF belongs to Scott Cawthon, its owner)
This world takes its place in the crack between entering heaven and leaving earth. It’s called “Abyss Dream”. Basically a different Earth merged with Heaven. It’s also a planet in the middle of the universe it may have two suns and a lot of surrounding stars but it has no assigned galaxy.
The “homeland” of the planet is one main island surrounded by other tiny islands. It’s called “The Homeland” ironically. The main island is centered directly above the equator of the planet. The geography of the island is quite mountainous but has plains and forests here and there. The forests are usually quite dense and dark.
“Obsolescent Eminence”. The mountain is about 22,841′ ft (Or 6,962 metres) in height and it’s circumference is 78 miles ( Or 125 km). There are many many tunnels in the main two mountains, they are formed by remaining hallways and rooms of the FNAF 2 location.
The Deep Dark is far beneath Obsolescent Eminence. It will become almost impossible to traverse in these halls due to how impossibly dark it is. The walls will be covered in grime, and the floor, lined with trash. This place highly resembles the FNAF 3 location.
Around the base of the mountain are five aging cabins surrounded by dense pine trees. Further East through that dense mess only gets denser and denser. It could possibly give you “Little Red Riding Hood” vibes.
To the West is the wide plains; “Fabled Grassland”. There is a very small town consisting of at least six houses each fit for a small family. It is abandoned, however. Further to the North of the plains you will encounter a small stretch of forest before reaching an endless ocean where the sun sets.
This forest stretches around half the Homeland ending by the Fables and starting at the Eastern side of the island. It also surrounds MT Obsolescent Eminence.