the nullarbor plain is a treeless vast expanse of flat land bordering on the cliffs of the great australian bight

australia australian bight blowhole blowholes caiguna camels cave caves cliff cliffs drilling environment expanse exploration flat great head highway kangaroos karst layer limestone lions miles national nullarbor ocean plain prisitine reef road seals section south southern swell tourism travel traverses tree treeless trip turn vast western wildlife wombats