Australia is located in Oceania, with its capital city of Canberra. It was originally inhabited by indigenous peoples until 1770 when James Cook discovered the land and began establishing Britain's penal colony in New South Wales. Australia has several major coastal cities including Sydney, Melbourne, Brisbane, Perth, Adelaide, and Canberra, its capital. Notable landmarks include the Sydney Opera House, Uluru rock formation of cultural significance to indigenous Australians, and the Great Barrier Reef, home to diverse marine life.