It's really cheap and easy to stretch your legs or walk about while travelling rather than a coach or car.

Check out www.overlandit.com where you can get a few options for Oz

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Free bus sevrice (route 555) operates a continuous loop between Central Station and Circular Quay along George St & Elizabeth St in both directions.
Approx. every 10 mins.

Mon - Fri 09:30-15:30 (extends to 21:00 on Thurs)
Sat, Sun & public hols (excl Christmas Day) 09:30-18:00

Map of route & stops at url below

www.sydneybuses.info/uploads/File/pdfs/regular_route_maps/555map.pdf

www.sydneybuses.info/news/115/91.htm

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In Sydney, get a Sydney Pass. We had unlimited travel on buses, including the two explorers (Sydney and Bondi), trains and ferries for A$110 each, allowing us to see what we wanted at our own pace.

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