Osan-ri Prehistory Museum (오산리선사유적박물관)

Osan-ri Prehistory Museum in Yangyang, Gangwon, is the dedicated public museum on the Osan-ri Neolithic archaeological site — one of Korea's most important Neolithic sites, with about 6,000-year-old shell-mound and dwelling-site material that has substantially expanded what historians know about Korean Neolithic coastal life. The museum displays original artifacts (stone tools, pottery, shell ornaments, fish-bone material), life-size reconstruction dioramas of Neolithic Osan-ri life, and bilingual interpretation contextualizing the site within broader East Asian Neolithic record. The actual Osan-ri site sits adjacent to the museum. Free entry. About 90 minutes. Pair with the broader Yangyang coastal attractions like Naksansa Temple or Naksan Beach.