Australia is a country located in the southern hemisphere, comprising the mainland of the Australian continent, the island of Tasmania, and numerous other islands. It is the world’s sixth-largest country by total area and the largest country in the region of Oceania. Australia has a diverse and multicultural population with influences from all corners of the world.The largest cities in Australia are Sydney, Melbourne, Brisbane, Perth and Adelaide. Sydney is the largest city and the country’s capital. Melbourne is the nation’s commercial and cultural center. Brisbane is a gateway to the rest of Australia, while Perth is considered the cultural and economic hub of the west, and Adelaide is the country’s third most populous city.