Benxi Shuidong National Park  The Benxi Water Caves () is a partially submerged cavern system containing a forest of stalactites and stalagmites, located east of Benxi, Liaoning Province, People's Republic of China. It was made a national park on January 10, 1994, and is open to the public all year round. It was designated an "AAAAA"-class tourist attraction by CNTA in 2015. The giant 5-million-year-old cavern complex is lit by colored artificial lighting, and expands over with a maximal width of , maximal ceiling height of , an area of and a volume of over . It has a subterranean river long, with an average depth of and maximal depth of , and a daily discharge of . Currently of the cave has been developed for tourism, with a dock into the entrance and a docking bay large enough to park 40 boats. Temperature inside the cave is constant throughout the year, at around , though slightly warmer in summer than winter. In addition to the water caves, the national park also offers tourist attractions such as trekking to the top of the mountain, Woodstone Kingdom, dinghy rafting on the Taizi River, and the geological museum which hosts many relics and rare specimens collected from the national park area.