Shey Phoksundo National Park provides a diversity of spectacular landscapes and ranks among the most scenic mountain parks in the world. Much of the park lies north of the Himalayan crest. Elevations range from 2,130 m (6,990 ft) in the southeast near Ankhe to 6,883 m (22,582 ft) at the summit of Kanjiroba Himal, which lies at the southern edge of the Tibetan plateau.
Phoksundo Lake lies at an elevation of 3,660 m (12,010 ft) in the upper reaches of the Suligad river. It is surrounded by glaciers and famous for its magnificent turquoise color. Near the lake’s outlet is the country’s highest waterfall.
Phoksundo Lake has a water surface of 494 ha (1,220 acres) and was declared a Ramsar site in September 2007. The lake is up to 145 m (476 ft) deep, measured using echo-sounding technology.
The Langu river drains the high Dolpo plateau located in the north-east of the park. The Suligad and Jugdual rivers form the southern catchment flowing south into the Thuli Bheri River.
Dolpo (Standard Tibetan) is a high-altitude culturally Tibetan region in the upper part of the Dolpa District of western Nepal, bordered in the north by China.
Part of the region lies in Shey Phoksundo National Park. The sparse, agro-pastoral population, known as Dolpo in standard Tibetan and Dhol-wa in the local dialect, is connected to the rest of Nepal via Jufal airport, which can be reached in three days by horse.
There are no precise population numbers for the region, with estimates including less than 5,000 and 18,000
The Dolpo are generally adherents of Bon, a religion whose origins predate Buddhism but whose modern form is officially accepted as a fifth school of Tibetan Buddhism. The remote region has preserved its Tibetan culture in relatively pure form, making it attractive to Westerners.
Despite the near inaccessibility of the region and tourism restrictions for the more remote parts, Dolpa is a popular destination for trekking tourism.

Source: Wikipedia
Photo gallery: @Lhakpa Dorji Sherpa