Tourists go sightseeing on a transparent horseshoe-shaped cantilever bridge at the Yunyang Longgang Geological Park in Chongqing, southwest China, April 14, 2018. The cantilever bridge is built at an altitude of 1,010 meters, with a vertical drop of 718 meters directly under the skywalk to the ground and a cantilever extending to 21.34 meters. (Xinhua/Wang Quanchao)