Canberra is the capital city of Australia. With a population of 381,488, it is Australia's largest inland city and the eighth-largest city overall. The city is located at the northern end of the Australian Capital Territory (ACT), 280 km (170 mi) south-west of Sydney, and 660 km (410 mi) north-east of Melbourne. A resident of Canberra is known as a "Canberran". Although Canberra is the capital and seat of government, many federal government ministries have secondary seats in Sydney, as does the Governor-General and the Prime Minister.
Australia officially 'The Commonwealth of Australia', is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It is the largest country in Oceania and the world's sixth-largest country by total area. The neighbouring countries are Papua New Guinea, Indonesia and East Timor to the north; the Solomon Islands and Vanuatu to the north-east; and New Zealand to the south-east. Australia's capital is Canberra, and its largest urban area is Sydney.
Sydney is the state capital of New South Wales and the most populous city in Australia and Oceania. Located on Australia's east coast, the metropolis surrounds the world's largest natural harbour and sprawls about 70 km (43.5 mi) on its periphery towards the Blue Mountains to the west, Hawkesbury to the north and Macarthur to the south. Sydney is made up of 658 suburbs, 40 local government areas and 15 contiguous regions. Residents of the city are known as "Sydneysiders". As at June 2016 Sydney's estimated population was 5,029,768.
Mount McClintock is the highest mountain (3,490 m / 11,456 ft) in the Britannia Range in Australian Antarctic Territory, surmounting the south end of Forbes Ridge, 10 kilometers (6.2 mi) east of Mount Olympus. It is also higher than all other peaks of Australia, including all external territories. It was discovered by the Discovery expedition (1901-04) and named for Admiral Sir Leopold McClintock, Royal Navy, a member of the Ship Committee for the expedition.
The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland, Australia.