Tibet is located in the southwest of China. With more than 50 mountains of 7000 meters above sea level including 11 above 8000 meters, Tibet is more than 4800 meters above. In addition to the cold weather, low air pressure and thin air, Tibet is called "World's Roof" and "the Third Pole of the earth". There are splendid mountains and rivers, unique ethnic cultures, densely scattered temples and surreal natural landscape. The tourism industry in Tibet mainly targets on cultural sightseeing, also providing mountain climbing, hiking and science exploring. Based in Lhasa, there are more than 60 sightseeing places opened to the visitors from both China and the rest of the world. Lhasa, the biggest city of Tibet. with a history of 1300 years, is located on the north bank of the Lhasa River and about 3700 meters above sea level. With numerous of historical remains like Potala Palace and Jokhang Temple, Lhasa is the political, economic, cultural and religious center of Tibet.