Cornwall is a visually stunning region, and Fowey is a worthy stepping stone, filled with medieval and Georgian buildings cheek-by-jowl. It is a picturesque old town on the banks of the Fowey estuary, on a shoreline designated the Polperro Heritage Coast. St. Finnbarr’s Church is new, rebuilt in the 15th century after a French raid destroyed the first one. The waterside watchtower is matched with …