South Dakota is located in a part of the central plains, high toward the Rocky Mountains rise slowly. Southern State to the Missouri River as the middle, separating two very different areas. Missouri River flows through the southern states of the center of the south, then turn southeast to form and Nebraska state lines. Missouri River in the east, by the ancient glaciers that ground level prostitution, and leave the hill in the northeast and 120 small lakes. Missouri River, the West Bank is covered with grassland, and southern states in the north-west rows of Lonely Mountain and the Black Gang <Black Hills> and very spectacular in the southern Badlands.