Many dolmens find themselves in most areas of the Korean peninsula and some northeast areas of China. In particular, as many as 14,000 dolmens have been discovered in and around Pyongyang.

Not a small number of groups, each consisting of 300-600 dolmens, have been found out in Pyongyang and its vicinity.

In the Taedong River basin, there are all kinds of dolmens ranging from old-typed to latest-typed ones belonging to different periods, such as Chimchon-ri dolmen and Odok-ri dolmen.

This area has much more extra-large dolmens for royal families than other areas.

Many of them have top stones with a size of over 50 square meters and weight of 80-100 tons and chambers with a height of 2.5-2.7 meters.

Typical ones are in Jang-ri, Sangwon County, Pyongyang, in Songmae-ri (before Odok-ri), Yonthan County, North Hwanghae Province and in Kwansan-ri, Unryul County and Roam-ri, Anak County, South Hwanghae Province.

The concentrated distribution of such large-sized dolmens in and around Pyongyang shows clearly that many people of power and wealth had lived in the area at that time and, consequently, Pyongyang had not only been the capital of Tangun's Korea but also been a hub of culture in the period of ancient Korea.