Grandfather Oak is the greatest and oldest tree of Arvandor, a gigantic tree that supports entire tribes of elves in its leafy top and in the wide hollows between trunk and branches. A great dell between two of its roots houses the realm's chapel to Labelas Enoreth, the elven god of longevity.
Grandfather Oak is named and respected as a living creature, much as sailors refer to their ships as female. He has been shaped from living wood for countless generations, and elven generations at that. Grandfather's living quarters are in the higher branches, shelters built with deadwood carefully brought up from the forest floor and interwoven with vines. The oldest of these shelters have become overgrown with Grandfather's wood. In addition, Grandfather keeps many guest chambers, small entrances into the trunk itself, like squirrel holes.
Grandfather Oak is the home realm of Sotillon, Grandfather Oak is the home realm of Faunus