If you guessed the movie by just looking at the name and picture of the lake, then we take it that you are bigger movie fans than us. For the sake of others, this surreal lake is the location where the climax portions of the 2009 blockbuster ’3 Idiots’ was filmed. This YouTube video talks very engagingly about the difficulties that the crew went through to shoot at this location that is situated 14000 feet above sea level. Looks like they canceled their original plans of shooting the movie there because of unexpected snow but the crew loved the location so much that they came back the next year to shoot the scenes they wanted at this disputed location.

About the location (from Wiki):
Pangong Tso is an endorheic lake in the Himalayas situated at a height of about 4,350 m (14,270 ft). It is 134 km (83 mi) long and extends from India to China. 60% of the length of the lake lies in China. The lake is 5 km (3.1 mi) wide at its broadest point. During winter the lake freezes completely, despite being saline water. 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.

Pangong Tso is geographically situated in a disputed territory, claimed both by India and China. After mid-19th century, Pangong Tso was southern end of so-called Johnson Line, a first attempt of demarcation between India and China in the Aksai Chin region.

Movies shot at this location:
Climax scene from 3 Idiots
Tu Hi Tu from Dil Se
Subah Hogee song from Waqt – Race Against Time
Surra Surra song from Shakti