Seoul Seokchon-dong Gobungun

Several tomb types occur at the site. The stone-mound tombs resemble the developed stepped stone-mound tombs of Goguryeo in outward form but differ in their interior. Tomb 3 is built of stone both inside and out in the Goguryeo manner, whereas Tombs 2 and 4 have stone-built bases and stairs but an interior filled with earth, which is the Baekje manner. Tomb 1 survives only as a base and consists of two tombs joined from north to south; the southern one is of Goguryeo type and the northern one of Baekje type.

Tomb 3 measures 50.8 m by 48.4 m and is 4.5 m high, the largest of the group. Its size and date suggest that it is the tomb of King Geunchogo or King Geungusu. Tomb 4 is 17.2 m long and follows the Baekje form; a passage on the reign of King Gaero, which speaks of burying a father's bones in a coffin of large stones, has led some researchers to propose that it is the tomb of King Biyu. Tomb 5 is an earthen mound in good condition, the only one remaining in the area, with a diameter of 17 m and a height of 3 m. It was only partly excavated, in order to preserve it, and its interior has not been examined.

Systematic investigation of Baekje remains along the Han River began in the 1960s, but floods over the centuries had already destroyed most of them. From 1971 the area was threatened by the Jamsil development project, and the national museum carried out rescue excavations. In the autumn of 1974 a team of the Seoul National University Museum led by Professor Kim Won-yong excavated Tombs 3 and 4 on an emergency basis. The work showed that the structure and building style of the Baekje stone-mound tombs resembled the Goguryeo stone-mound tombs near Gungnae (Huanren).

Road construction in 1983 cut through the base of Tomb 3. Professor Yi Hyeong-gu then led a renewed survey of the tomb and its surroundings, which identified seven large stone-mound tombs and more than 30 pit burials and jar burials. In 1987 nearby houses were removed, a full investigation followed and the Baekje Tomb Park was laid out. A sinkhole appeared in 2015, and excavation has continued since. Results in 2020 showed that several stone mounds were joined in a linked form, that a wooden-chamber tomb lay beneath one of them, and that cremated and crushed human bones had been buried.

Baekje pottery, roof tiles and gold earrings were recovered from inside and around the tombs. Pit burial No. 2 yielded a short-necked grey jar and a plain gold earring.