There are lots of islands inside Sydney Harbour, including Shark Island, Clark Island, Fort Denison, Goat Island, Cockatoo Island, Spectacle Island, Snapper Island and Rodd Island. Some other former islands, including Bennelong Island, Garden Island and Berry Island are now connected to the mainland by bridge or by landfill. There are several islands only accessible by boat, for example Fort Denison and Cockatoo Island. Boat hire operators offer charter trips or self-drive options to these locations. 