Cha Loi cave system (in Ngan Thuy commune, Le Thuy district, Quang Binh) is located next to Phong Nha - Ke Bang National Park, about 40km southwest of Dong Hoi city center. This place once left the mark of General Vo Nguyen Giap - the eldest brother of the Vietnam People's Army and is also home to the Bru Van Kieu ethnic group.