10 death-defying trails you’ll still want to hike [pics]
Suspended 4,000 feet above a ravine sits a glass walkway on Tianmen Mountain. Three feet wide and 2.5 inches thick, the walkway allows tourists to test fate and modern engineering. While the walk is not physically strenuous, the 70ft glass bridge takes a mental toll on those who decide to look down. Tourists are asked to wear shoe covers before crossing the bridge, as cleaning the glass is considered too dangerous.