Off the south coast of Majorca, this verdant isle is one of the last unspoiled places in the Mediterranean—the largest of the 19 islands that make up the Cabrera Archipelago. To protect its dramatic landscape, varied wildlife, and lush vegetation, it was declared a national park in 1991. Throughout its history, Cabrera has had its share of visitors, from the Romans to the Arabs. Today, the only intact historical remains are those of a 14th-century castle overlooking the harbor. Tours are operated daily by the Marcabrera company. Boats depart from Colònia de Sant Jordi, 47 km (29 miles) southeast of Palma. Full-day trips, starting at 10 a.m. and returning at 3:00, with a stop to swim or snorkel in the mysterious Cueva Azul (Blue Cave), are €54, or €64 with a guide; 2-hour excursions by speedboat, leaving six times a day between 9 and 7, are €44.