Two affiliated facilities across the harbor from Sydney proper chronicle the area's prehistoric and more recent pasts. The mines museum, which occupies a small converted train station, surveys area history but focuses on Sydney's coal-mining connection. Displays at the fossil center include 300-million-year-old specimens from the Sydney Coal Fields. The fossil center's curator leads two-hour fossil-hunting field trips, by reservation, on Tuesdays and Thursdays at 10 am;
you'll need your own transportation to the trip's starting point.