Guardian trees

The Guardian trees were 500 ft (152.4 m) tall trees that surrounded the Moonstone Palace in Leuthilspar on the island of Evermeet.

Description
Each tree was over 50 ft (15.2 m) in diameter and contained rooms and corridors.

Inhabitants
Gold elves were stationed in these trees, and giant eagles were often found at their tops.

Sourcebooks

 * Elves of Evermeet