Unlike most, Chewbacca was known to travel below this marking point for most Wookiees. The bulk of Wookiee civilization was located on the uppermost seventh level, and even the bravest Wookiees rarely ventured below the fourth level. According to Wookiee culture, this vertical environment consisted of seven levels. The prevalent ecology could be politely described as a 'layered deathtrap,' as the dangers presented by local wildlife increased as one descended toward the forest floor. Much of the planet could be compared to a giant swamp-filled with wildlife and covered with wet soil and large amounts of water. Kashyyyk's highest peak was Korrokrrayyo Mountain. The Kashyyyk coastlines were lined with a brownish-white sand and thick grasses. In addition, a few sandy beaches could be found along the shores of its oceans. A tropical ocean belt contained archipelagos and long coral reefs. The planet did have a small amount of desert region in the rain-shadow of its small mountain ranges as well as large plains including the Woolwarricca region. The planet had four continents, making up 40% of the surface, which were mostly covered in lush, wroshyr tree-filled forests, which were several kilometers high.
It was composed of a molten metallic core, rocky mantle, and a silicate rock crust.
With no axial tilt and a perfectly circular orbit, Kashyyyk experienced one continuous season. It stirs the blood and makes one feel…alive.' ― Juhani
