Fodor's Expert Review Castel Sant'Elmo

Perched on the Vomero, this massive castle is almost the size of a small town. Built by the Angevins in the 14th century to dominate the port and the old city, it was remodeled by the Spanish in 1537. The parapets, configured in the form of a six-pointed star, provide fabulous views. Once a major military outpost, the castle these days hosts occasional cultural events.