Upper Mustang Trek located north of Annapurna region at an elevation of 4000m is physically and culturally division of the Tibetan highland. The valleys are barren and dry with vivid rock formations holding many caves high up in the rock face. Upper Mustang is a restricted spot until 1992, at present visitors are allowed with entry permit. Upper Mustang is one of the regions left where one can perceive untouched Tibetan way of life.