Sydney’s largest island and one of Australia’s most interesting historical sites. It used to be a prison from 1839-1869, an industrial school from 1888-1908 and a shipbuilding yard from 1847-1992. It was opened to public in 2007.
You get there by catching the ferry from Wharf 5 at Circular Quay. The ferry ride takes about half an hour.
There are places to eat, both cafés and restaurants or if you want to do a picnic, that’s also possible. You can even stay the night. The glamping is a fun alternative but if this is not up your alley, there is also a solid-wall option on the island as well.