Đồng Hới is located on the National Road 1A, North-South Railway and Ho Chi Minh Highway, at the coordinates 17 21' N and 106 10’ E. This city is situated in the heart of Quang Binh Province. It borders Bố Trạch on the north, Quang Ninh on the south, theSouth China Sea on the east and Quang Ninh on the west. It is 50 km south of Phong Nha-Ke Bang National Park, 50 km north of Bang Spa, 180 km southeast of Cha Lo border gate with Laos. It has a coastline of 12 km. Nhật Lệ River is the only river that runs through the city. Tro Lake is the source of fresh water for the city-dwellers. The Nhat Le Beach is endowed with fine and white sand