Lake Manasarovar has long been viewed by the pilgrims as being nearby to the sources of four great rivers of Asia, namely the Brahmaputra, Ghaghara, Indus and Sutlej, thus it is an axial point which has been thronged to by pilgrims for thousands of years. The region was closed to pilgrims from the outside following the Battle of Chamdo; no foreigners were allowed between 1951 and 1980. After the 1980s it has again become a part of the Indian pilgrim trail.