on Tainmen Mountain, China. The challenge consisted of climbing 999 steps at a 45 degrees angle. It began at the bottom of the Tianmen Mountain Road, which has a stairway and 99 dizzying turns.

With 3.7 million square miles of land, China ... Kunlun Mountains, the Tianshan Mountains, and the Qinling Mountains. But there is a lesser-known and very unique range called the Tianmen, in ...