Dolmens are huge tombs consist of stone walls and heavy stone cover existing from prehistoric age and are known as megalithic culture.
The Dolmens were generally used as tombs, also used to symbolize communal tombs or altar for religious service. They are called "Goindol" in Korea, "dorumen" in Japan and seobung in China and in other places they are called dolmen or megalith.
The dolmens are megalithic culture, which appeared after the beginning age of agricultural development, and the number of dolmens around the world counts for about 55,000 and 26,000 of them are scattered in Korea, which is about 50% of the entire number of dolmens. This means the Korea plays an important role as the center of megalithic culture.