John D. MacArthur Beach State Park

Florida state park on a barrier island in northern Palm Beach County.

Quiet and nature-focused vibe. Coastal hammock and mangrove forest back a beach good for swimming and snorkeling, with a nature center open Tuesday to Sunday and kayak and paddleboard rentals. Entry is $5 per vehicle (2 to 8 people). Pets are not allowed on the beach or boardwalks. Main restrooms were closed for septic work, with portable ones on site.