Fodor's Expert Review Ninigret Park

This 227-acre park off Old Post Road, formerly a World War II–era naval air training base, now features picnic grounds, ball fields, a playground, a bike path, tennis and basketball courts, a criterium bicycle course, nature trails, a disc-golf course, and a 3-acre spring-fed swimming pond (with lifeguards on duty in the summer). The Charlestown Seafood Festival is held here in August, and the excellent Rhythm & Roots concert festival rolls into the park every Labor Day weekend.