No countries physically border Australia, but some of the closest countries to Australia are Indonesia, East Timor, Papua New Guinea and New Zealand.
Australia is all one nation.
Australia is a continent that consists of just one nation, which is also named Australia.
Australia is the smallest continent that contains only one nation, which is also called Australia.
Australia is a nation all on its own - there is only one nation in Australia.
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Debatable, but Australia is deemed "One Continent, One Nation"
Antarctica has no nations. Australia is one nation.
Tasmania is one of the states of Australia.
There have never been any other nations within Australia, but neither has Australia always been one nation. Prior to Federation of the states on 1 January 1901, Australia was made up of six separate, self-governing colonies.
Australia is the smallest continent and it is also an island. Of all the continents, Australia is the only one that consists of one nation and is not divided into different countries.
Pakistan has one nation and two states, which are Punjab and Sindh.
Australia is a nation in its own right.