The Mysterious Sky Caves of Nepal
The Sky Caves of Nepal, also known as the Mustang Caves, refers to 10,000 artificial caves constructed in the Mustang District of Nepal.
The region was formerly the Kingdom of Lo, with the capital located at Lo Manthang, until the kingdom was annexed by Nepal during the 18th century AD.
The caves were carved into a steep cliff face 155 feet above the valley basin, overlooking the present-day village of Samdzong near the Kali Gandaki River in Upper Mustang.
Who built the Sky Caves and when the caves were first constructed has eluded archaeologists and academics, with one theory suggesting the caves date as far back as 8-10,000 BC, but the caves have been divided into three distinct periods of occupation.
More:
https://www.heritagedaily.com/2020/09/the-mysterious-sky-caves-of-nepal/134980