Seongsan shell mound is a shell mound located in Seongsan-gu, Changwon-si.
Shell mounds are the remains of shell mounds made up of shells that were eaten and discarded in the past. Among the mounds of shells, everyday utensils used in the past were discarded together, making them an important archaeological site.
Seongsan shell mound is comprised of a field, a shell layer, a fortress, and an exhibition hall.