Tatooie

Tatooie is a volcanic island inhabited by a primitive tribe of tree people.

"Chief Woodrow"
Woodrow Burns once went to Tatooie and got in good with the natives, who made him an honorary tribe leader. Unfortunately they then expected him to sacrifice himself to the lava gods by jumping into an active volcano (at least that's how he tells it).

"The Alien Invasion of Griffin Rock"
The experiences of explorers on the island were made into a movie named The Natives of Tatooie, which caused a ruckus in Griffin Rock when Huxley Prescott accidentally intercepted its transmission.