Namtso_lake:the Namtso lake located at the north part of lhasa ,it is 250km distance from lhasa city,is called ‘Tengali sea' that is means heaven lake from Mongolic,the lake elevation is 4718m with the total area is 1940square km,also a second largest saltwater lake in tibet,the first largest is cokornor(qinghai lake) in china province it is over 70km long ,reaches a width of 30km and is 35m at deepest point,the lake lined near the Nyenchen Tanglha range ,