Gochang, Hwasun and Ganghwa Dolmen Sites
The Gochang, Hwasun and Ganghwa Dolmen Sites (Korean: 고창 화순 강화 고인돌 유적) are the location of hundreds of stone dolmens which were used as grave markers, and for ritual purposes during the first millennium BCE when the Megalithic Culture was prominent on the Korean Peninsula. The sites were designated as a World Heritage Site by UNESCO in 2000.
Source: Wikipedia — Gochang, Hwasun and Ganghwa Dolmen Sites (CC BY-SA 4.0)