Surveyor Generals Corner, State boundary tripoint in the Great Victoria Desert, Australia

Surveyor Generals Corner is a tripoint in the remote Australian desert where the borders of Western Australia, South Australia, and the Northern Territory all meet. Two concrete pillars, placed some distance apart, mark the exact spot where these three territories come together.

In 1922 an agreement between Prime Minister Billy Hughes, South Australia's acting premier John George Bice and Western Australia's premier James Mitchell fixed the border along the 129th meridian, defined by lines through the Deakin Obelisk (1926) and Kimberley Obelisk (1927). When ground survey resumed in 1963, the lines could not meet exactly on the 26th parallel. In June 1968 two concrete pillars were completed about 127 metres apart; the eastern one, common to all three jurisdictions, was named Surveyor Generals Corner on the suggestion of the Director of National Mapping, with surveyors-general H.A. Bailey, Harold Camm and P.J. Wells present.

The Irrunytju community, one of the most remote Aboriginal settlements in Australia, manages access to this area and requires visitors to request permits in advance. The land around this point is considered traditional country, and entering without permission is not allowed.

Reaching this spot requires several permits, including one from the Irrunytju Community Office and a transit permit for the Great Central Road. Because the location is deep in the desert, the trip demands thorough planning and the right equipment before setting out.

Three different time zones meet at this point, which means a visitor could technically celebrate New Year three times on the same evening. This makes it one of the rare places in the world where stepping a few paces left or right changes the clock.