The Badlands Wall is the primary feature of the Badlands National Park North Unit (formerly Badlands National Monument). As the White River carved into the landscape, it created a valley with badlands formations on either side with an erosional “wall” on the north side of the valley spanning east (near Kadoka, SD) to west (Wall, SD). The Badlands wall, consisting of the rock formations the park is famous for, separates the lower prairie to the south and upper prairie to the north.