Wangtiandong in Huanren County, Benxi City, is located in Huanren Manchu Autonomous County. It has been found to be more than 5,000 meters long. The landscape inside the cave is charming, strange, special and dangerous, with stone forests, city walls, snow lotus, glaciers, fountains, waterfalls, dark rivers, etc. Wangtiandong is rare in the world. Experts of the Chinese Academy of Sciences said that the 6,000 square meters hall in the cave and the 10,000-meter maze on the upper, middle and lower floors are the world's most