Tundra :  (noun)

1: a vast treeless plain in the arctic regions between the ice cap and the tree line

Alaska, Antarctic Zone, Antarctica, Arctic Circle, Arctic Zone, Frigid Zones, Greenland, Iceland, Lower Slobbovia, North Pole, Novaya Zemlya, Siberia, South Pole, Tierra del Fuego, alkali flat, alluvial plain, basin, bottomland, bushveld, campo, champaign, champaign country, coastal plain, delta, desert, down, downs, fell, flat, flat country, flatland, flats, grass veld, grassland, heath, lande, level, llano, lowland, lowlands, lunar mare, mare, mesa, mesilla, moor, moorland, open country, pampa, pampas, peneplain, plain, plains, plateau, playa, prairie, salt flat, salt marsh, salt pan, savanna, sebkha, steppe, table, tableland, the Antarctic, the Arctic, the Hebrides, the Yukon, tree veld, upland, vega, veld, weald, wide-open spaces, wold,