These step pyramids and the mound tomb are located in sokchon-dong, zamshil, seoul, korea. There were 89 cairns with pyramids in 1920's. Most of them were destroyed, even that in photos you can see, which are restored closely to the former (not original) state. But I think it could have been 5th or 7th steps. The biggest one(No. 3) measures 51.5m x 50.3m now, which is known to be constructed before A.D. 400.

photo of No. 3 before the restoration

No. 3 and a stone coffin on the 3th floor of it.

No. 4 and the supporting stones.

No. 2 and the 3th floor.

1) The outer square & inner circle stylobate remains. 2) N0. 1 remains. 3) A mound tomb.

1) Plan of pyramids site. 2) Several ancient coffins; wood, stone, jar. Stone coffins are found in or under the pyramids.

(photos taken in Jan 1998, written in Jan 1998)