Just a few suggestions I guess c:
Various types of trees, tropical, temperate, etc just numerous trees for everyone to use c:
Something i would personally love: A large, oak type tree with a hollowed out bottom part among the roots that leads into an open area that one could use as a den, im sure you know the type ^^
Perhaps some various cave structures and so on, and some dried grass "nests" that characters could use to sleep in.
I'll say if I think of anything else for you c: