It was at this very location ten thousand years ago that Shaohao, the Last Emperor of Pandaria, defeated the Sha of Fear and imprisoned it within the land.
From the Book of Burdens, Chapter 14:
"Although purged of doubt and despair, Emperor Shaohao was still overcome by fear. He sought the counsel of the Black Ox, spirit of bravery and fortitude, who lived in the steppes beyond the wall."
"The Black Ox, Red Crane, Emperor, and Monkey King discussed the nature of fear at great length, until at last the Monkey King was inspired to act. A mask of fear was created, terrifying to behold. With trembling hands, the Emperor donned the horrific mask, so as to draw forth his own fears..."
The battle against the Sha of Fear lasted a week and a day, during which time legend has it that the sun never rose. When the Sha was at last defeated and imprisoned in the earth, Emperor Shaohao was forever changed, for he no longer felt his own fears. He became a creature of courage.