In 1926, a French archaeologist, Madeleine Colani, discovered and excavated many artifacts in caves and grottoes in west mountainous areas of Quảng Bình. She concluded that the Hòa Bình culture belonged to this region. Through C14 dating test, the artifacts dated back to 10,509 (plus or minus 950) years ago. From Quy Đạt township (in Minh Hóa District) to 150 m southwest, the Hum grotto contains many stone tools and animal stones from an ancient human community. Inside the Khai grotto near Quy Đạt township, similar artifacts were also found. Especially, there are several ceramics of Đông Sơn culture. Additionally, artifacts from the Stone Age were unearthed in some grottoes in Quảng Bình. Owners of these artifacts lived in the caves and grottoes and hunted for their food.