One of the largest lakes in Mongolia and top attractions in western Mongolia. The lake is fed by the Zavkhan gol river and other smaller Rivers through Airag, which is a nearby located smaller fresh-water lake. The lake and its surrounding area were proclaimed a National Park and established in 2000. The basic attraction of the lake is Khetsuu Khad (Hard Rock), an enormous rock sticking out of the water that attracts migratory cormorant birds. The birds arrive in April and hatch their young in large nests built on the rock.