It was at this very location ten thousand years ago that Shaohao, the Last Emperor of Pandaria, defeated the Sha of Despair and imprisoned it within the land.
From the Book of Burdens, Chapter 9:
"After his success in the Jade Forest, Emperor Shaohao was filled with courage but fretted over an uncertain future. He sought the counsel of the Red Crane, the spirit of hope, deep within the Krasarang Wilds."
"The Red Crane told the Emperor that hope was within all of us, if we looked deep enough. With that, the Monkey King presented Emperor Shaohao with a mask of Despair, a forlorn visage of terrible sadness. The Emperor donned the mask and drew out his own hopelessness..."
The battle against the Sha of Despair lasted four days and five nights in a pouring rain, but with the help of the Red Crane and the Monkey King, all of Shaohao's despair was extinguished.
From that day forth the Emperor knew the future was bright. He became a creature of hope.