Just recently I stumbled upon this treehousepoem from Shel Silverstein, he also wrote songs for Johnny Cash.

“A tree house, a free house,
A secret you and me house,
A high up in the leafy branches
Cozy as can be house.

A street house, a neat house,
Be sure and wipe your feet house
Is not my kind of house at all-
Let’s go live in a tree house.”
-Shel Silverstein