Green Gables House, the pretty wooden farmhouse that inspired Lucy Maud Montgomery's Anne of Green Gables, is perhaps Prince Edward Island National Park's best-known landmark. Another cultural attraction is the Victorian mansion Dalvay-by-the-Sea, built in 1895 by an American oil industrialist. This national historic site is now a hotel with tennis, a driving range, croquet, and horseshoes.

Greenwich, on the tip of the Greenwich Peninsula—which separates St. Peters Bay from the Gulf of St. Lawrence—is a segregated part of the park, east of the park's main strip. Rare crescent-shaped coastal dunes hold a variety of plant species and archeological relics dating back 10,000 years. The Greenwich Interpretation Centre provides an insight into this precious area with 20 interactive exhibits and a multimedia presentation. The three-mile-long Greenwich Dunes Trail begins with a long boardwalk to the towering dunes to an excellent swimming beach with lifeguards.