Busselton is a city in the South West region of the state of Western Australia approximately 220 km (140 mi) south-west of Perth. Busselton has a long history as a popular holiday destination for Western Australians; however, the closure of the Busselton Port in 1972 and the contemporaneous establishment of the nearby Margaret River wine region have seen tourism become the dominant source of investment and development, supplemented by services and retail. The city is best known for the Busselton Jetty, the longest wooden jetty in the Southern Hemisphere.