Namtso Lake is the largest lake in Tibet, and the highest lake in the world. The lake surface is at 4,740 meters above sea level, measuring about 70 kilometers long and 30 kilometers broad, with a surface area of 1,920 square kilometers. Namtso lake is accessible all year around. Staying at Namucuo overnight is extremely worthwhile. The sunrise and sunset are breathtakingly beautiful. You would find the night sky filled with stars, and even see the nebula of the Milky Way.