Piazza del Plebiscito and the Basilica di San Francesco di PaolaHow many days do you need in Naples? Three days in Naples or a long weekend lets you add an easy day trip to Pompeii. It’s just round the corner from the Royal Palace, making it easy to fit into your 3 days in Naples. It’s a good contrast to the grit of the historic centre, and a nice way to close out the trip. I’ve compared all five versions here to help you work out if it’ll pay for itself over three days in Naples.