Tomb of the Two Lovers

The Tomb of the Two Lovers is the resting place of the two first Earthbenders, Oma and Shu. It is located within the labyrinthine Cave of Two Lovers underneath the Kolau Mountains. The tomb lies in the middle of the ever-changing maze.

History
In the episode "The Cave of Two Lovers", Katara, Aang and Appa came upon the tomb when they are separated from Sokka and the bards. Aang proceeded to read the inscription on the tomb's walls, which recounts the lives of those interred. Oma and Shu were from two seperate villages, and they fell in love despite their villages' rivalry. They learned Earthbending from the Badgermoles and tunneled through the mountain that separated their towns to be together with one-another. One day, Shu was killed in battle, and in response, Oma unleashed her Earthbending powers upon both villages. However, instead of destroying her kinsmen, Oma decided to declare peace between the two villages, and as a symbol of their truce, both villages built a city atop the mountain that divided their people, and named it Omashu.

Besides the inscription, the tomb contains two large rock sarcophagi and a statue of Oma and Shu kissing. When the light from Aang's torch beginned to fail, he and Katara lean in for one last kiss. However, as soon as the fire went out, crystals lit up on the ceiling, revealing the path of exit from the cave.