
http://en.wikipedia.org/wiki/Dolmen
위키피디아의 설명이네요
Korea[edit source]
The largest concentration of dolmen in the world is found on the Korean peninsula. With an estimated 35,000 dolmen, Korea alone accounts for nearly 40% of the world’s total.[6]
The largest distribution of these is on the west coast area of South Korea.
Three specific UNESCO World Heritage sites at Gochang, Hwasun and Ganghwa ( Hwasun