What? - Capital and other important cities

The capital of Australia is Canberra. The city is located in the Australian Capital Territory, surrounded by New South Wales. It lives around 347,000 people in Canberra and is Australia's eighth largest city. The language that people speak in Canberra and in Australia is English. The currency of Australia is the Australian dollar.

Canberra covers an area of 805.6 square kilometers and is located near the Brindabella mountain range, about 150 kilometers from the east coast of Australia. Canberra is a very green city and has lots of parks and shady streets.

Another major city in Australia is Sydney. Sydney is Australia's largest and oldest city. Because of Sydney's location in the harbor, it is one of the most beautiful cities in the world. Sydney's two best-known buildings is The Sydney Opera House and the Sydney Harbour Bridge. They have become symbols of Australia.

Canberra

Sydney

Sources:
http://www.visitcanberra.com.au/en/Visitor-Info/Facts-and-figures.aspx
I have also read some information from a book.