The World's Largest Parkour Course

This is the Skyladder Parkour Course at Tianman Mountain in China. It consists of 999 steps and has an average incline of 45 degrees. Calen Chan, a 19-year-old free-runner from Utah, got to run all the way down. With a GoPro camera held in his mouth!

(YouTube link)

Oh yeah, the video might make you a little dizzy.