At least 4000 feet in the air a three-foot-wide walkway clings to one face of Tianmen Mountain in Zhangjiajie, China, above a rocky ravine. With a glass bottom, the tourist attraction provides a crystal-clear view of where one wrong step could take you.
49 Islands You Must Visit Before You Die There's a big world out there filled with islands just waiting for your arrival. We curated the 49 best islands across the globe that you absolutely must visit before you die. Time to get out the bucket list.