China just opened the world's highest glass walkway -- without handrails

Instagram Embed:://instagram.com/p/BJNOPwLDVtl/embed/Width: 800px Glass bridges have become somewhat ubiquitous in China. But the new skywalk that just opened on Shanghai's 88-story Jinmao Tower makes a glass bridge look like a walk in the park. Instagram Embed:://instagram.com/p/BI2yrXZj9BT/embed/Width: 800px With a glass bottom and no handrails, this tourist attraction takes some courage. Visitors are strapped into a harness and are then free to walk the almost 200-foot-long walkway, which sit...