Sydney is the state capital of New South Wales and the most populous city in Australia and Oceania. Located on Australias east coast, the metropolis surrounds the worlds largest natural harbour, and sprawls towards the Blue Mountains to the west, Macarthur to the south and Hawkesbury to the north. Sydney is made up of 658 suburbs and 40 local government areas. Residents of Sydney are known as "Sydneysiders". Sydney is the location of the secondary official residences of the Governor-General of Australia and the Prime Minister of Australia, Admiralty House and Kirribilli House respectively. The Cabinet of Australia also meets in Sydney when needed. The Sydney area has been inhabited by indigenous Australians for at least 30,000 years. Despite being one of the most expensive cities in the world, the 2014 Mercer Quality of Living Survey ranks Sydney tenth in the world in terms of quality of living, In addition to hosting events such as the 2000 Summer Olympics, Sydney is amongst the top fifteen most-visited cities in the world, with millions of tourists coming each year to see the citys landmarks.