Osan-ri Prehistory Museum houses the oldest remains of the Prehistoric age to be found in Korea. The site is not only important for understand the long history of Korea and its culture, but is also invaluable in understanding the general historical relation to the rest of East Asia. As a result, it was designation Historic Site no. 394. Inside the museum is a life-sized diorama, the first of its kind, displaying the lifestyles of prehistoric times and prehistoric relics of the Yeongdong region. The Relics Exhibition Room is divided into six sections, the Introduction, Overview, the Osan-ri Prehistoric Story, the Story of Relics Unearthed, the Mandaecheon Story, and a conclusion. There are also hands-on programs to help visitors experience prehistoric life and culture.