Pangong Tso (or Pangong Lake; Tso: Ladakhi for lake) is a lake in the Himalayas situated at a height of about 4,250 m (13,900 ft). It is 134 km (83.3 mi) long and extends from India to Tibet. Two thirds of the length of this lake lies in Tibet. The lake is 5 km (3 mi) wide at its broadest point. In winter, the lake surface freezes completely despite being salt water.

Pangong Tso can be reached in a five-hour drive from Leh, most of it on a rough and dramatic mountain road. The road traverses the third-highest pass in the world, the Changla pass, where army sentries and a small teahouse greet visitors. The spectacular lakeside is open during the tourist season, from May to September. A special permit is required to visit the lake. While Indian nationals can obtain individual permits, others must have group permits (with a minimum of four persons) accompanied by an accredited guide; the tourist office in Leh issues the permits for a small fee. For security reasons, India does not permit boating. There is a small hostel as well as campsites and houses with primitive guestrooms in the village a few miles towards the border with Tibet. Most of its inhabitants herd sheep and goats and have relatively recently given up nomadic ways. A significant temple stands below the peaks overlooking the village and the lake.
The lake is in the process of being identified under the Ramsar Convention as a wetland of international importance. This will be the first trans-boundary wetland in South Asia under the convention. Source: wikipedia