Daredevil visitors can now walk or sit on the glass walkway for up to 30 minutes. Here's the catch: there are no handrails to hold onto. Instead, you'll be harnessed to an overhead rail while you ...

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. With a glass bottom and no handrails, this tourist attraction takes some ...