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The Sydney Harbour Bridge is not classified as one of Australia's "big things", as it is a functional structure.
Australia's "big things" can be found at the related link below.
Australia is about as big as the United States and Europe.
Really Big Things - 2007 Skyscraper Cranes - 2.8 was released on:
USA: 2007
Australia: 28 December 2008
No, Big Bird from sesame street is not from Australia
Really Big Things - 2007 Cirque Du Soleil Big Top 2-1 was released on:
Australia: 16 November 2008