The Caverns of Forever, a sprawling system of caves, lay deep beneath the Heart Tree of the planet Cularin. In the era of the Clone Wars, the Tarasin chieftain Dariana and the Jedi Master known as Lanius Qel-Bertuk established the Great Plan within these caverns; this sanctuary was intended for those who were Force-sensitive, as the Heart Tree's powerful life force concealed their Force signatures.