Benxi Shuidong (Benxi Water Caves; Chinese: 本溪水洞国家公园) was made a national park on January 10, 1994. The Benxi Water Caves are located 30 km east of Benxi, Liaoning province, China. The Benxi Water Caves are a forest of stalactites and stalagmites within a cavern system lit by colored lighting. A river 3,000 meters long, 2 meters deep and wide enough for 20-30 boats, flows through a giant 5 million-year old cavern system. Temperature inside the cave is constant throughout the year, is 12C. It is warm in winter and cold in summer, also it is open around the year.

• http://en.wikipedia.org/wiki/Benxi Shuidong National Park