2 Best Sights in Sydney Harbour, Sydney

The Sydney residence of the governor-general, the Queen's representative in Australia, this impressive residence is occasionally open for inspection and can be viewed from the water during harbor cruises.

Although it's still known as an "island," this promontory was connected with the mainland in 1942. During the 1941–45 War of the Pacific (WWII and a number of preceding conflicts), Australia's largest naval base and dockyard was a frontline port for Allied ships. Part of the naval base is now open to the public. Access, seven days a week, to the site is via ferry from Circular Quay (take the Watsons Bay ferry). Visitors can view the museum and picnic on the hill. The Naval Historical Society runs tours to the "secure" section of Garden Island but these must be booked well in advance. The 90-minute tours run every Thursday.