It literally means the " Source of the Lake" in Bhutia language. It is located 38ks from Gangtok. The serene lake is situated at an altitude of 12318 feet. It is about one km long, in oval shape, 15 mts deep and is considered Sacred by Local people. This placid lake remains frozen duing winter months ( November to February). Between May and August is also the blooming ground of variety of flowers and Rododendrons. It is also habitat of Red Panda and other species of birds. It is now open for foreigners and Indians as well. Foreign visitors have to be in a group of two or more to get the permit thru a registered travel agency.