Jinmao Tower, a 420.5 meter long landmark skyscraper in Shanghai, China just recently opened a glass-bottomed walkway to the public. A scary attraction sits 340 meters (1,115 ft) above the ground and offers its visitors a 30-minute walk on the edge. No handrails. The visitors are harnessed to an overhead rail which enables them to move around freely on the 60-meter long walkway.
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