Oh Now This is Awesome! A glass bridge in northern China is about 872 feet long and hangs about 3,871 feet above the valley floor. Someone got the clever idea to give the glass bottom the illusion that the glass floor is cracking as You walk on. Visitors are terrified by the experience and yet they just keep coming to the bridge anyway. The guys who put the whole thing together said they wanted to put a little extra "zing" into their experience. Don't worry the walkway is tested daily to ensure that it can handle the traffic.