Because who doesn't want to sleep in a forest full of dangerous things?
Basic idea: A thick forest with a jungle-like terrain (Hilly, crossed by a few streams, etc) and a copious amount of trees and vegetation. Lighting should be somewhat darker since you're under a jungle canopy, and it would be best if you could not leave the jungle, since the trees won't repeat with the terrain. To do this, I thought that using a high concentration of trees as a type of wall would be a good way to hold people inside and make it look good.
Tl;dr:
Jungle, darker, vegetation, wall of trees.
