In one wall of Kohime's bedroom is a small portcullis marked with a certain symbol carved into the keystone. Passing through finds one in a rainforest that seems to expand forever in all directions, though traveling more than a few minutes in any direction leads right back to the entrance.

The forest is covered in heavy foilage - the canopy is tall and thick and allows the Perfect amount of sunlight through, while also providing plenty of vertical space to climb. Heavy vines hang from branch to branch as well, and make great hangout spots for the inhabitants of the rainforest - birds, lizards, and rodents that look, behave, sound, and smell indistinguishable from the real thing but disappear like a Feint does when forceful physical contact is made with them.

The portcullis can be locked and unlocked by tapping the keystone.