Travelers are voting Certosa di San Martino, Cuomo Palace and Palace of Capodimonte as the best of 6 museums in Naples. There are 5 museums in Gaeta a city just 42 km from Naples and 5 museums in Formia which is 42 km distant. The most popular of these are Palatine Hill in Gaeta and Palazzo delle Esposizioni in Formia. You can find 6 museums in Campania and 69 museums in the country of Italy. Our members favorite in Campania is Certosa di San Martino and Castel Sant'Angelo is the top pick in Italy. Want more? Check out our map of museums in Naples.