Australia's oceans and seas include those off the mainland and its offshore territories in the Pacific, Southern and Indian Oceans as well as the Timor, Tasman and Coral Seas.
Australia is the sixth largest country in the world and is the only one of the top six completely surrounded by water.
The Australian continent is almost as long as it is wide.
Land areas of States and Territories
Australia is the planet's sixth largest country after Russia, Canada, China, the USA, and Brazil.
Officially, there is no centre of Australia, but over time and with ingenuity, several methods for calculating the centre of the mainland have been developed.
The positions of the borders are mostly familiar. The more unusual include one separating states which is only 85 metres long and another which is entirely surrounded by a state.
Australia is a land of extremes with temperatures ranging from highs of 40°C in the central desert regions to below freezing in the higher regions of the country's southeast.
Australia's territory ranges far beyond its continental borders.