Dolpo is one of the last places in the world where Bon, the pre-Buddhist animist religion of Tibet, survives as a living tradition alongside Tibetan Buddhism. Shey Gompa, at 4,370 m near the Crystal Mountain, is a major pilgrimage site for both Bon practitioners and Tibetan Buddhists, and the annual Crystal Mountain kora (circumambulation) takes place in late summer. The monastery at Shey dates back several centuries and contains important murals and thangkas.
Phoksundo Lake, at 3,641 m, is the largest and deepest lake in Nepal, and its turquoise-blue colour comes from the mineral composition of the glacial meltwater feeding it. The village of Ringmo on the lake's shore is a Bon community, and the residents follow traditions including a prohibition on fishing in the lake. Trekkers are expected to respect these traditions, including walking clockwise around mani walls, removing footwear inside gompas and asking before photographing religious sites or individuals.