The Great Australian Bight is at the southern end of the
continent, where the Nullarbor Plain dramatically ends in a vast, escarpment that plummets into the
Southern Ocean. This sheer cliff-face of limestone stretches for over 200 km
and is believed to be the longest unbroken cliff line in the world.
Australians consider the Great Australian Bight to be the curve extending from
Cape Pasley, in the west, to Cape Carnot, near Port Lincoln, a distance of 1160
km, however, according to the definition laid down by the International
Hydrographic Bureau in 1953, the Bight commences in the west at West Cape Howe
and stretches to South West Cape in Tasmania. It also stated that the boundary
between the Bight and Bass Strait was a line from Cape Otway, in Victoria,
through King Island to Cape Grim, Tasmania.