Australia, officially the Commonwealth of Australia, is a sovereign 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. Sydney, capital of New South Wales and one of Australia's largest cities, is best known for its harbourfront Sydney Opera House, with a distinctive sail-like design. Massive Darling Harbour and the smaller Circular Quay port are hubs of waterside life, with the arched Harbour Bridge and esteemed Royal Botanic Garden nearby. Sydney Tower’s outdoor platform, the Skywalk, offers 360-degree views of the city and suburbs. The Gold Coast is a metropolitan region south of Brisbane on Australia’s east coast. It's famed for its long sandy beaches, surfing spots and elaborate system of inland canals and waterways.Cairns, considered the gateway to Australia's Great Barrier Reef, is a city in tropical Far North Queensland. Its Tjapukai Aboriginal Cultural Park tells the stories of indigenous Aboriginal and Torres Strait Islander people with music and dance