The Jeongok-ri Prehistoric Site (전곡리 선사유적지), is a prime site on the Korean peninsula for the study of Paleolithic relics, and was unearthed after the discovery of a stone implement by an American soldier who was visiting an amusement park near Hantangang River in the winter of 1978. It was identified as an Acheulean Paleolithic stone implement by an expert, and gained the attention of experts from around the world. The Jeongok-ri Prehistoric Site is situated on a basalt deposit that was likely formed during the Precambrian era. More than 3,000 relics have been discovered, allowing extensive Paleolithic research not only by Korean, but also international experts. The Jeongok-ri Prehistoric Site also maintains a Paleolithic Relics Hall, an archive, and other facilities for visitors. There are also outdoor sculptures that represent daily life during the Paleolithic era, erected with the intent of preserving the natural aesthetic. Together, the facilities and sculptures aid our understanding of the Paleolithic era.