Due to it's size the country has many varied climate regions similar to the USA, from deserts to snow capped mountains and tropical rainforests.
There are eight capital cities in Australia, all of which function at a sub-national level. Canberra also serves as the national capital. Melbourne was the national capital from the Federation of Australia in 1901 until 1927, when the seat of national government was moved to the newly created city of Canberra.
In each capital city, local judicial, administrative and legislative duties are performed for the jurisdiction. In the case of state and territory capital cities, they also happen to be the most populous city in their respective jurisdiction.