The Gochang, Hwasun, and Ganghwa Dolmen Sites in South Korea are remarkable for their extensive collection of dolmens, which are stone grave markers and ritual sites from the first millennium BCE. These sites showcase the Megalithic Culture that was once prevalent on the Korean Peninsula and have been recognized as a UNESCO World Heritage Site since 2000. The dolmens are considered invaluable for understanding the social and cultural practices of the time, as well as the stonework techniques used by the ancient peoples of Korea.