Fastening a safety rope and dangling off a terrifyingly high skyscraper. A fenceless, glass-bottomed walkway opens outside the 88th floor of a high-rise building in Shanghai, offering adrenaline ju...

Fastening a safety rope and dangling off a terrifyingly high skyscraper. A fenceless, glass-bottomed walkway opens outside the 88th floor of a high-rise building in Shanghai, offering adrenaline junkies breathtaking views of the Chinese economic hub.