Shihuadong (Stone Flower Cave) is located in Nancheying Village in the magmatic national geological park of Fangshan District, about 50 km from downtown Beijing. Discovered in the year 1446, it is a seven-story water-eroded cave with a drop of 130 meters. At present, only the topmost four layers are open to the public, but they offer a 2,500-meter, almost two-hour touring route.[China.org.cn]