A local herdsman walks by his tent at the sunset near the Namco Lake, some 240 kilometers north of Lhasa, capital of southwest China's Tibet Autonomous Region, July 26, 2010. Namco, listed as the highest salt water lake at an altitude of 4,718 meters in the world, covers an area of more than 1900 square kilometers. Namco Lake has become a popular tourist destination in Tibet. [Purbu Zhaxi/Xinhua]