The Nullarbor Plain stretches approximately 1,100km | 685mi between the borders of South Australia and Western Australia. The name Nullarbor comes from the Latin, nullus meaning “no” and arbor meaning “tree”. First crossed by Europeans in 1841 by the explorer Edward John Eyre, the plain was inhabited at the time by semi-nomadic Aborigines. Crossing the Nullarbor , which remains largely uninhabited, has become an iconic journey for many Australians. The limestone underlying the Nullarbor Plain forms a significant karst region.
Below the arid desert landscape lie beautiful water bodies with clean subterranean lakes and flooded passages. Some of these cave systems are known to extend up to 3.5km | 2.2mi below ground. Caves to be dived include: Tommy Grahams Cave, Murra El-Elevyn, Cocklebiddy, Weebubbie, Koonalda and Pannikin Plains Caves, to name a few. The intricate passages of the limestone formations open up into underground cathedrals. In one part of Webubbie evidence of giant kangaroos have been found. The caves are known for their spectacular clear water that has been described by some divers as being so clear you don’t realise you are underwater.