At least 4000 feet in the air a three-foot-wide walkway clings to one face of Tianmen Mountain in Zhangjiajie, China, above a rocky ravine. With a glass bottom, the tourist attraction provides a crystal-clear view of where one wrong step could take you.
Skywalk on Tianmen Mountain, China. Stretching around a cliff on Tianmen Mountain in China, the skywalk offers incredible views of Hunan province's lovely landscapes. For those with no fear of heights, the skywalk is 4700 feet up the mountainside.