Australia is one of the biggest country in the world and it’s well known by it’s kangoroos. Most of the Australia is covered by tropical area. Sydney is the oldest, bigest and most well knowing city of Australia. Sydneys most fameous building is Opera House wich is olso symbol of the city. The other famous building Sydney has, is Harbor bridge. Milions of tourists come to see this worlds largest steel arch bridge. Australias population is 20 milions people, but there is twice as much kangaroos.