Declared in 1979, the huge Nullarbor National Park is a 50-kilometre by 200-kilometre strip of the famous Nullarbor Plain, stretching from the head of the Great Australian Bight to the border of Western Australia. Along its southern edge, 80-metre-high cliffs drop to the deep blue of the Great Australian Bight Marine Park. In the north, the park joins the massive Nullarbor Regional Reserve, which extends to the Trans Australian Railway.