Ham-an Marisan Tumuli Cluster in Ham-an County holds the tombs of the Ara Gaya ruling class. Large tombs built in the fifth century, when Ara Gaya was strong, stretch across the area, and pottery and iron artifacts were excavated there. Seeing the Dohang-ri, Malsan-ri and Nammunoe tumuli clusters takes about two hours, and Ham-an Museum and the Marisan Tumuli Exhibition Hall can be visited as well. Construction sections are present in various places.