Cave of two lovers

A secret tunnel located by Omashu that passes through the Kolau mountains. It is a giant underground labyrinth full of dangerous animals including Wolfbats and Badgermoles. Legend tells us that the tunnels were created by Oma and Shu, who fell in love during a time of war despite being from enemy villages. They are believed to be the first Earthbenders, and created tunnels in the mountain. In the center of the labyrinth is the Tomb of Two Lovers, believed to contain the remains of the two encased side-by-side in two massive stone sarcophagi. The walls of the tomb are decorated with carvings telling the story of the two lovers. And they seem to change so you are never where you seem to be. Legend also says you can get out if you "let love lead the way".