Terkhiin Tsagaan Lake is an astonishingly beautiful lake with relatively pure fresh water. Torrents of lava issuing from the Khorgo volcano blocked the north and south Terkh rivers, so forming the dammed lake of Terkhiin Tsagaan Lake at an altitude of 2060 meters above sea level. The lake is 16 km wide, 4-10 meters deep with its deepest point at 28 meters and over 20 kilometers in length. It flooded 61,1 square km. The lake supports Pike and other fish. Rare birds are found here
Terkhiin Tsagaan Nuur established in 1997 and was designated as a Wetland of International Importance during the Ramsar Convention in 1999.