When your cruise docks in Naples (or somewhere within the region), or if you are staying in the area, or coming by train/flight, take advantage of your short time in this area of Italy and pick the best of what Campania region is capable to offer to you: Positano, Pompeii ruins & Mount Vesuvius. These three stops will exceed your wildest and highest expectations of South of Italy. Positano is the pearl of the Amalfi coast, Pompeii is the most well preserved old Roman town, and Mount Vesuvius is the coolest hike you could do in Italy!