Pangong Tso, meaning "high grassland lake" in Tibetan, is a breathtaking endorheic lake situated in the Himalayas at an elevation of 4,225 meters (13,862 feet). Spanning roughly 134 kilometers (83 miles) in length, the lake uniquely crosses international boundaries, extending from the Union Territory of Ladakh in India to the Tibetan Autonomous Region in China. Approximately 40% of the lake's length lies within Indian territory, 50% in Tibet (China), and the remaining 10% forms a disputed buffer zone.
The lake is globally renowned for its surreal beauty, characterized by crystal-clear, brackish waters that famously change color—shifting from brilliant shades of azure and deep blue to green and even purple depending on the time of day and sunlight. Despite being saline, the lake freezes completely during the harsh Himalayan winters, allowing visitors and locals to walk across its icy surface.
Pangong Tso gained massive international popularity following its feature in the climax of the 2009 blockbuster Bollywood film *3 Idiots*. Since then, it has transformed from a quiet, remote military frontier into one of Ladakh's premier tourist destinations. Beyond its visual splendor, the lake holds immense geopolitical significance due to the Line of Actual Control (LAC) passing directly through its waters, making it heavily guarded and heavily monitored by both Indian and Chinese armed forces.
