Perched high above the cliffs of northwest China's Shaanxi Province, Huashan Mountain is famed as one of the country's most perilous peaks. Its legendary skywalk – a narrow path made of wooden planks bolted directly into the sheer rock face – challenges even the bravest. Now, in a jaw-dropping operation, the skywalk undergoes a safety upgrade, including the replacement of its steel cables. Viewer discretion is advised for individuals with acrophobia!