Tourists challenge themselves by following a walkway built on the edge of a cliff, about 1,000 meters above the ground, at a scenic spot in Yunyang county, Southwest China’s Chongqing municipality, May 16, 2015. The path, which is 3,200 meters long and one meter wide, includes a section made of glass that allows visitors to look straight down into the deep valley. (Photo: China News Service/Liu Xiaoyang)

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