The Tree Realm is a very distant and old realm that is connected to the PCG Universe through portals and other gateways.
Description[]
The realm is mostly an empty void, with a few notable features. Somewhere within the realm, is a great Tree, where the The Squirrel Lord, as well as the Squirrel King, Beako, and others, reside. ("TREE")
The realm also has an outer wall, with castle ramparts. This outer wall was once attacked by a large dragon. ("Beako's Defense")
There's also a bridge -- an endless walkway, which robots like Bot travel to perform maintenance. The walkway goes underneath the Tree, and the bots perform maintenance on the pool of energy which the tree's roots draw on. ("Bot's Bridge")
History[]
A massive battle was fought between two races of Beatles. The realm's ground material slowly disintegrated over time until only trees and a void was left. (Chronicles Addendum)
An Unknown Protagonist visited the realm and explored the trees. ("TREE" by Xaq, and "The Gray Tree" by Epic Worlds PCG)