The proper name of this whs is Gochang, Hwasun and Ganghwa Dolmen Sites, alas I am not sure which site this relates to, or if its one or two of the three sites. In any case, great addition to my collection, thank you Sehan :)
The prehistoric cemeteries at Gochang, Hwasun, and Ganghwa contain many hundreds of examples of dolmens - tombs from the 1st millennium BC constructed of large stone slabs. They form part of the Megalithic culture, found in many parts of the world, but nowhere in such a concentrated form.
Usually consisting of two or more undressed stone slabs supporting a huge capstone, it is generally accepted that they were simply burial chambers, erected over the bodies or bones of deceased worthies. They are usually found in cemeteries on elevated sites and are of great archaeological value for the information that they provide about the prehistoric people who built them and their social and political systems, beliefs and rituals, and arts and ceremonies.