Having visited the justifiably famous trio of Rome, Florence, and Venice, many tourists think that they have seen Italy. What a mistake: southern Italy has fascinating archaeological sites, gorgeous coastlines, medieval walled villages, beautiful sand beaches, marvelous hilltowns, and some of the most unusual sights in Italy. Many visitors who venture south from Rome are amazed to discover that the Emerald Grotto on the Amalfi Coast rivals the Blue Grotto of Capri and that the Greek ruins of Paestum outshine many found in Greece, and they are haunted by the mysterious town of Alberobello.