This is a semi-natural, three-floor dungeon. It is not overly complicated, and fairly straight forward to run. It has plants that can be used as difficult terrain. It includes wide hall ways so that you can populate the dungeon with Large creatures. It includes a secret room on the bottom floor, with a giant golden bear statue. It is up to you what that is, though a powerful construct is fun. Personally, I am using it to tease my own players, as it will be hard to get out of the dungeon!
Here are some fun creatures to inhabit it:
A colony of giant ants
Smokey Bear and the Forest Friends
A Circle of Druids
Blights/Vegepygmies