After their defeat against Azula and her friends, some of the Kyoshi Warriors were imprisoned here. After his capture at Ba Sing Se, Iroh was imprisoned here. Prior to the eclipse, he secretly began a rigorous workout, able to regain a significant amount of strength. Using the eclipse and Warden Poon's lack of firebending to his advantage, Iroh easily overwhelmed him and escaped. After Zuko declared his intentions of joining the Avatar, he went to free Iroh from prison, only to find a busted up cage and a semi-conscious Warden Poon.