Queensland State flag, Commonwealth of Australia

Queensland (locally /ˈkwiːnzlænd/ KWEENZ-land,[note 1] commonly abbreviated as QLD) is a state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south, respectively. To the east, Queensland is bordered by the Coral Sea and the Pacific Ocean; to the state's north is the Torres Strait, separating the Australian mainland from Papua New Guinea, and the Gulf of Carpentaria to the north-west. With an area of 1,723,030 square kilometres (665,270 sq mi), Queensland is the world's sixth-largest subnational entity; it is larger than all but 16 countries. Due to its size, Queensland's geographical features and climates are diverse, and include tropical rainforests, rivers, coral reefs, mountain ranges and white sandy beaches in its tropical and sub-tropical coastal regions, as well as deserts and savanna in the semi-arid and desert climatic regions of its interior. Queensland has a population of over 5.5 million,[9] concentrated in South East Queensland, where nearly three in four reside. The capital and largest city in the state is Brisbane, Australia's third-largest city and comprising fully half of the state's population. Ten of Australia's thirty largest cities are located in Queensland, the largest outside Brisbane being the Gold Coast, the Sunshine Coast, Townsville, Cairns, Ipswich, and Toowoomba. 24.2% of the state's population were born overseas.[10] The state has the highest inter-state net migration in Australia.[11] Queensland was first inhabited by Aboriginal Australians, with the Torres Strait Islands inhabited by Torres Strait Islanders.[12] Dutch navigator Willem Janszoon, the first European to land in Australia, explored the west coast of the Cape York Peninsula in 1606. In 1770, James Cook claimed the east coast of Australia for the Kingdom of Great Britain. In 1788, Arthur Phillip founded the colony of New South Wales, which included all of what is now Queensland. Queensland was explored in subsequent decades, and the Moreton Bay Penal Settlement was established at Brisbane in 1824 by John Oxley. During the Australian frontier wars of the 19th century, colonists killed tens of thousands of Aboriginal people in Queensland while consolidating their control over the territory. On 6 June 1859 (now commemorated as Queensland Day), Queen Victoria signed the letters patent to establish the colony of Queensland, separating it from New South Wales and thereby establishing Queensland as a self-governing Crown colony with responsible government. A large part of colonial Queensland's economy relied on blackbirded South Sea Islander slavery.[citation needed] Queensland was among the six colonies which became the founding states of Australia with Federation on 1 January 1901. Since the Bjelke-Petersen era of the late 20th century, Queensland has received a high level of internal migration from the other states and territories of Australia and remains a popular destination for interstate migration. Queensland has the third-largest economy among Australian states, with strengths in mining, agriculture, transportation, international education, insurance, and banking. Nicknamed the Sunshine State for its tropical and sub-tropical climates, Great Barrier Reef, and numerous beaches, tourism is also important to the state's economy.