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A new glass walkway opened to the public in China this week. The terrifying walkway spans 100 meters along the side of Tianmen Mountain in Hunan's Zhangjiajie National Forest Park. Brave visitors ...
on Tainmen Mountain, China. The challenge consisted of climbing 999 steps at a 45 degrees angle. It began at the bottom of the Tianmen Mountain Road, which has a stairway and 99 dizzying turns.