The Cliffs of Anguish are a set of high steep faces of a rock. It is unknown of where the exact location is or why it represents anguish.
There is nothing else known of these cliffs other than being the home of the Black Steel Flying Lizards, who constantly tormented the Chih Kuan Crane Clan. The feud had finally ended when the Crane Clan sought out the help of Master Oogway and defeated the Black Steel Flying Lizards. This great battle was henceforth called the Battle of Burning Sky, which took place seven hundred years ago during the Hour of the Rat.