The Caves of Elshuu were a network of subterranean chambers situated within The Tomb on the planet Belsavis. Throughout the Galactic War, these caves served as the location of the Mind prison for the Rakata known as Elshuu, and his adherents maintained it.
The Caves of Elshuu are featured as a zone on Belsavis in the 2011 Star Wars: The Old Republic video game.