The thought of walking along a five-foot-wide path coiled around the side of a mountain like a python on its prey while suspended 4,600 feet in the air is enough to make many people get a bit wobbly ...

Intermittent signals, lack of visibility, hairpin turns, and plunging gradients - on the serpentine mountain road of Tianmen Mountain in Zhangjiajie, Central China's Hunan Province, known locally as ...