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The Great Barrier Reef, by far the world's largest coral reef, lies a short distance off the north-east coast of Australia. Uluru, in central Australia, is the second largest monolith in the world.

Perth is the state capital city of Western Australia, the largest state in Australia. Perth is the world's most isolated city of more than a million people. In June 2003 the Perth Metropolitan Area had an estimated population of 1,433,217, making it the fourth largest city in Australia.

Australia may have been sighted by Portuguese sailors in 1601, and Dutch navigators landed on the forbidding coast of modern Western Australia several times during the 17th century. Captain James Cook claimed it for Great Britain in 1770. At that time, the native population may have numbered 300,000 in as many as 500 tribes speaking many different languages. The Aboriginal population currently numbers more than 300,000, representing about 1.7% of the population. Since the end of World War II, efforts have been made both by the government and by the public to be more responsive to Aboriginal rights and needs.

Perth is set on the Swan River, so named because of the native black swans. It is a sprawling city, extending to Joondalup in the north, Mandurah in the south and Mundaring in the east. The coastal suburbs take advantage of Perth's oceanside location and clean beaches. To the east, the city is bordered by a low escarpment called the Darling Scarp. Perth is on generally flat, rolling land - largely due to the high amount of sandy soils and deep bedrock.

Australia's population has more than doubled since the end of World War II, spurred by an ambitious postwar immigration program. In the 19th century, Australia enacted strong measures to prevent immigration by nonwhites. After World War II, immigration from Greece, Turkey, Italy, and other countries increased Australia's cultural diversity. In 1973, Australia officially ended discriminatory immigration policies, and substantial Asian immigration followed. By 1988 about 40% of immigration to Australia was from Asia, and by 1997 Asians constituted about 5% of the population. The indigenous population, the Australian Aborigines and Torres Strait Islanders, make up 2.2% of the population, according to the 2001 Census. In 2001, the political campaign was dominated by issues of immigration and national security and there still remains substantial anxiety among Australians concerning immigration.

Rainfall in Australia is highly variable, with frequent droughts lasting several seasons. Occasionally a duststorm will blanket a region or even several states and there are reports of the occasional large tornado. Rising levels of salinity and desertification in some areas is ravaging the landscape.