In addition to the popular Sydney attractions such as
Opera house,
Harbour bridge,
Bondi beach and
Taronga Zoo, you can also explore the tiny Islands of
Sydney namely Shark Island Clark Island, Cockatoo Island, Fort Denison, Goat Island & Rodd Island. I have been to Sydney 4 times and one of my favourite Sydney attractions is the 'Shark Island', it's a perfect picnic destination in the middle of Sydney Harbour with a small beach. It can be easily reached by a water taxi from Sydney Harbour and you can explore surfing, swimming, bodyboarding and fishing here. Cockatoo Island is also one of the popular Sydney attractions and it's the largest island of Sydney. If you are looking for unusual Sydney attractions, then try these Islands :), Good luck!