Go for a stroll by the water and get some fresh air at Charlestown Harbour. It's always relaxing watching the boats coming and going.
Charlestown Harbour is a great place to begin your discovery of St Austell. This place for ships to anchor is recommended by fellow travelers, but it isn't the only thing to do here. Allow time for other sights like Eden Project, Lost Gardens of Heligan, and Fowey Estuary to fully appreciate what the area has to offer.