Namtso, one of the most beautiful lake in China, was born in the Paleogene age, as a result of Himalayan tectonic plate movements. The lake lies at an elevation of 4,718 m (15,479 ft), and has a surface area of 1,900 km2 (730 sq mi). This salt lake is the largest lake in the Tibet Autonomous Region. However, it is not the largest lake on the Qinghai-Tibet Plateau. That title belongs to Qinghai Lake (more than twice the size of Namtso); which lies more than 1,000 km (620 mi) to the north-east in Qinghai.