It was at this very location ten thousand years ago that Shaohao, the last emperor of Pandaria, defeated the Sha of Doubt and imprisoned it within the land.
From the Book of Burdens, Chapter 5:
"Shaohao meditated for three days and three nights, for the counsel of the Jade Serpent was unclear. How could one purge oneself of all doubt?"
"Weary of waiting, Shaohao's travelling companion the Monkey King whittled a strange grimacing visage out of bamboo. He urged the Emperor to place the mask of doubt on his face..."
While mischief was the Monkey King's motivation, the mask worked - As Shaohao pulled the mask away, his doubts took on a physical form. For seven hours they fought, until the Sha of Doubt was buried.
From that day onward, the last emperor had no doubt that he would save Pandaria from the Sundering. He became a creature of faith.