. The city is dominated by the harbor, which people have described as one of the most spectacular in the world. There are three thing that you must not-and indeed cannot-miss. First, there is Sydney Harbor Bridge, one of the largest single arch bridges in the world. Second, the Sydney Opera House is a famous landmark that most visitor greatly anticipate seeing. Finally, don’t miss Fort Denison, where prisoners were kept in solitary confinement for days on a diet of bread and water. The best way to get around is by boat or hydrofoil, both of which have regular services leaving from Circular Quay . lf you prefer to do things one of the many boats available for this purpose?