Nal Hutta

Nal Hutta was a hot, swampy planet located in the galaxy's Outer Rim Territories that was the homeworld of the Hutt species. The planet was a haven for the criminal elements of the galaxy, located far from galactic authorities. Its terrain was covered with numerous bogs, and its climate often consisted of greasy rains.

Behind the scenes
"George [Lucas] had some very specific ideas about Nal Hutta. He gave us some really rough sketches. There was to be this very swampy, these big pustual orbs sticking up where they would build their palaces."

- Dave Filoni

Nal Hutta was first depicted in the episode Hunt for Ziro of Star Wars: The Clone Wars, based on George Lucas' ideas and sketches of how he envisioned the world.