At first glance, it's hard to imagine that this resort destination was one of the world's great naval powers, and a sturdy rival of Genoa and Pisa for control of the Mediterranean in the 11th and 12th centuries. Once the seat of the Amalfi Maritime Republic, the town is set in a verdant valley of the Lattari Mountains, with cream-colored and pastel-hued buildings tightly packing a gorge on the Bay of Salerno. The harbor, which once launched the greatest fleet in Italy, now bobs with ferries and blue-and-white fishing boats. The main street, lined with shops and pasticcerie, has replaced a raging mountain torrent, and terraced hills flaunt the green and gold of lemon groves. Bearing testimony to its great trade with Tunis, Tripoli, and Algiers, Amalfi remains honeycombed with Arab-Sicilian cloisters and covered passages. In a way Amalfi has become great again, showing off its medieval glory days with sea pageants, convents-turned-hotels, ancient paper mills, covered streets, and its glimmering cathedral.