Basumtso Lake is a stunning highland lake and the main attraction of Nyingchi area, which lies 90 kilometers west of Gongbogyamda County and was listed by World Tourism Organization as a world tourist site in 1997.
Basumtso Lake is also known as Cuogao Lake meaning green water in the Tibetan language. Basumtso Lake literally meaning “three rocks” in Tibetan, is a lake covering 26 square kilometers in Gongbo'gyamda County, Nyingchi Prefecture of the Tibet Autonomous Region in China, approximately 300 km east of Lhasa in Tibet. At 3,700 meters over sea level it is about 18 kilometers long and has an average width of approximately 1.5 kilometers. The deepest point of the green lake measures 120 meters. Covering 26 square kilometers (10 square miles), the clean green lake, reflecting snow capped peaks in the water, has so beautiful scenery that it makes one feels in Swiss. Fish are shoaling in the water; birds are circling in the air; beasts are roaming in the woods. Animals are living a comfortable and easy life in Basum.
It is a notable holy lake of Nyingmapa order of Tibetan Buddhism. On the northwest bank of the lake, there is a gigantic stone, which has a hole allowing one person to pass. Passing through the hole is said capable of relieve diseases and misfortunes. At the center of the lake on this island, there is an ancient Tsodzong Monastery of Nyingma Sect, which was founded in the 17th century under the direction of a monk Sangye Lingpa, by the Ningmapa sect of Tibetan Buddhists. The monastery is the home of one monk, and one of the oddities of the island is a combined Peach and cypress tree. Today, the monastery mainly houses Maitreya and Chenrezi. However, centuries ago, monks carved Buddhist figures and animals into the reef, bordering the small island making the small island a worthwhile stop to this beautiful highland treasure in Tibet known as Basum Lake. Every year crowds of pilgrims come from all directions to circumambulate the lake, pour butter for the lamps, burn joss sticks and pray in the temple. Near the south bank 3 kilometers to the lower part of the lake is a small island covering an area of about 2,000 square meters.
There are countless gorgeous places in the world, but only Basumtso Lake never releases her true face. Reflecting the picturesque snow-capped peaks around, it offers a "Swiss Alps" like scenery. It is surrounded by mountains and valleys in southeast Tibet, and enjoys a temperate climate. At the feet of the sown-clapped mountains, the vegetation is luxuriant and the trees of black maples, birches, pines, cypresses and azaleas connected each other to form a world of greenery. Thanks to its humid weather and mountainous topography, Basongcuo boasts a piece of very dense forest.