Acrophobia alert! Located at Chongqing's Yunyang Longgang National Geopark in southwest China, Cloudy Lounge Bridge is a glass-bottomed skywalk built 718 meters above the ground level. The shoe-shaped bridge extends 26.68 meters from the cliff wall, making it the world’s longest cantilever by some estimates. Visitors are amazed by the view and terrified by the altitude at the same time.