Great Australian Bight in the context of Border Village, South Australia

South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. With a total land area of 984,310 square kilometres (380,044 sq mi), it is the fourth-largest of Australia's states and territories by area, which includes some of the most arid parts of the continent, and with 1.5 million people, it is the fifth-largest of the states and territories by population. This population is the second-most highly centralized in the nation after Western Australia, with more than 67% of South Australians living in the capital Adelaide or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 26,878.

South Australia shares borders with all the other mainland states. It is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, and to the south-east by Victoria. To the south, its border is the ocean, the Great Australian Bight.

In geography, a bight (/baɪt/) is a concave bend or curvature in a coastline, river or other geographical feature, or it may refer to a very open bay formed by such a feature. Such bays are typically broad, open, shallow and only slightly recessed.

Bass Strait is a strait separating the island state of Tasmania from the Australian mainland (more specifically the coast of Victoria, with the exception of the land border across Boundary Islet). The strait provides the most direct waterway between the Great Australian Bight and the Tasman Sea, and is also the only maritime route into the economically prominent Port Phillip Bay.

Formed 8,000 years ago by rising sea levels at the end of the last glacial period, the strait was named after English explorer and physician George Bass (1771–1803) by European colonists.

The Spencer Gulf is the westernmost and larger of two large inlets (the other being Gulf St Vincent) on the southern coast of Australia, in the state of South Australia, facing the Great Australian Bight. It spans from the Cape Catastrophe and Eyre Peninsula in the west to Cape Spencer and Yorke Peninsula in the east.

The largest towns on the gulf are Port Lincoln, Whyalla, Port Pirie, and Port Augusta. Smaller towns on the gulf include Tumby Bay, Port Neill, Arno Bay, Cowell, Port Germein, Port Broughton, Wallaroo, Port Hughes, Port Victoria, Port Rickaby, Point Turton, and Corny Point.

The Nullarbor Plain (/ˈnʌlərbɔːr/ NUL-ər-bor; Latin: nulla feminine of nullus 'no' and arbor 'tree') is part of the area of flat, almost treeless, arid or semi-arid country of southern Australia, located on the Great Australian Bight coast with the Great Victoria Desert to its north. It is the world's largest single exposure of limestone bedrock, and occupies an area of about 200,000 square kilometres (77,000 sq mi). At its widest point, it stretches about 1,100 kilometres (684 mi) from east to west across the border between South Australia and Western Australia.

The Eyre Peninsula is a triangular peninsula in South Australia. It is bounded by the Spencer Gulf on the east, the Great Australian Bight on the west, and the Gawler Ranges to the north.

Earlier called Eyre's Peninsula, it was named after explorer Edward John Eyre, who explored parts of the peninsula in 1839–41. The coastline was first charted by the expeditions of Matthew Flinders in 1801–02 and French explorer Nicolas Baudin around the same time. Flinders also named the nearby Yorke's Peninsula and Spencer's Gulph on the same voyage.

The south coast of Western Australia comprises the Western Australian coastline from Cape Leeuwin to Eucla. This is a distance of approximately 1,600 kilometres (1,000 mi), fronting the Great Australian Bight and the Southern Ocean.

Nullarbor Links is an 18-hole par 72 golf course, said to be the world's longest, situated along 1,365 kilometres of the Eyre Highway along the southern coast of Australia in two states (South Australia and Western Australia), notably crossing the Nullarbor Plain at the head of the Great Australian Bight.

Border Village is a settlement located in South Australia within the locality of Nullarbor on the Eyre Highway at the border with Western Australia.

The settlement, which is 12 km (7.5 mi) east of Eucla, was named in 1993 by the South Australian Geographical Names Advisory Committee following a suggestion provided by the Royal Automobile Club of Western Australia. The settlement is located about 5 kilometres (3.1 mi) north of the cliff line separating the Nullarbor Plain from the Great Australian Bight.