where the nossob river flowing from the northwest (from gobabis, leonardville, and aranos) crosses the 20° line of longitude (the eastern border of namibia), the tripoint lies in the middle of the dry riverbed. it is located in kgalagadi transfrontier park, where beacons indicate the borders with botswana and south africa. on the namibian side of the border are farms, and since 1966, a straight fence has spanned the border. the name of the point dates to the union of south africa.