Kashyyyk
In the millennia before the rise of the Galactic Republic, Kashyyyk was a member world of the Infinite Empire. Its surface was terraformed by the Rakata, resulting in the abnormally large foliage which still covers the planet's surface in modern times. Its ecology can be politely described as a "layered deathtrap", the planet's surface being encompassed in shadow by trees that are many miles high. The dangerous and hostile animals increase closer to the forest floor. Hidden on the planet's surface is a Star Map, another piece in the puzzle of the location of the Star Forge.
(Wookie Home Planet)