Concierge.com's insider take:
Amalfi, the town that gives the coastline its name, lies about halfway between Sorrento and Salerno. Its name is derived from that of the nymph, Amalfi, loved by Hercules—legend has it that he buried her in the world's most beautiful spot after she died. Though it's entirely given up to tourism today, this was once a proud maritime republic, founded in the ninth century, which rivaled Genoa, Pisa, and Venice in stature and power. The bustling, café-lined port is served by hydrofoils to and from Salerno, Positano, and Capri, while the bus terminus on the quay offers road connections to Salerno, Ravello, Positano, and Sorrento. Buses to the latter two towns also pass by the upper entrance to the Grotta dello Smeraldo, a famous cave with 33-foot deep, crystal-clear waters that shimmer with emerald-green light thanks to an underground crevice. From the harbor area, pass under the Porta Marinara gate into Piazza del Duomo, pictured, Amalfi's open-air living room, which is dominated by the magnificent Duomo di Sant'Andrea. It's well worth scaling the steps to see the cathedral's splendid bronze door, cast in Constantinople in the 11th century, and its 13th-century Romanesque-Arabian cloisters, the aptly named Chiostro del Paradiso. You should also try to get away from the touristy main street into the narrow pedestrian streets above, which offer a glimpse of the town's unusual, Moorish-influenced vernacular architecture, with its whitewashed houses linked by arches and vaults—some of them so long that they turn certain lanes into tunnels.