Mustang Caves, Annapurna Conservation Area

Mustang Caves or Sky Caves of Nepal are a collection of some 10,000 man-made caves dug into the sides of valleys in the Mustang District of Nepal. Several groups of archaeologists and researchers have explored these stacked caves and found partially mummified human bodies and skeletons that are at least 2,000–3,000 years old. Explorations of these caves by conservators and archaeologists have also led to the discovery of valuable Buddhist paintings, sculptures, manuscripts and numerous artifacts belonging to the 12th to 14th century. The caves lie on the steep valley walls near the Kali Gandaki River in Upper Mustang. Research groups have continued to investigate these caves, but no one has yet understood who built the caves and why they were built. The site is currently listed as a UNESCO tentative site since 1996. ()