Tibet Autonomous Region (Xizang) is well known as the Roof of the World. It remained unknown to the world until the very beginning of the 20th century.

Tibet borders India, Burma, Bhutan, Sikkim, and Nepal. With an average height of 4,000 meters above sea level, Tibet encompasses some of the world's highest mountains.

The plateau is surrounded by the highest mountain ranges, the Himalaya to the south, the Karakoram to the west, and the Kunlun to the north. Smaller mountain ranges block it off in the east with internal provinces of China.