For 10 points, name this country whose capital is Canberra.
This country's national day celebrates the establishment of a settlement at Port Jackson. This country's highest point is named after a Polish general in the American Revolution, while its lowest point is located in its largest lake, Lake (*) Eyre. In its southwest is a vast, nearly treeless area known as the Nullarbor Plain. One province in this country, which was formerly known as Van Diemen's Land, is the island of Tasmania, and major cities in this country include Darwin and Perth. For 10 points, name this country whose capital is Canberra.
This country's national day celebrates the establishment of a settlement at Port Jackson.
Commonwealth of {Australia}