QINGYUAN, CHINA - JUNE 28: Aerial view of tourists visiting a glass bridge featuring a circular observation deck along a cliff at the Gulongxia scenic spot on June 28, 2018 in Qingyuan, Guangdong Province of China. The circular glass observation deck with a diameter of 16.8 metres suspended at the end of the bridge and jutted out 72 meters from the cliff edge, which enables tourists to enjoy the views of the valley and waterfalls. (Photo by VCG/Getty Images)
