Boat from Napels to Sorrento
Near the cruise terminal, you can take a hydrofoil (Alilauro company) to Sorrento. The ferries depart every 2 hours. A single trip takes about 40 minutes and costs € 11 per person. You can check the timetable in advance.
TIP: Go by train to Sorrento and come back by ferry or vice versa. This will make your trip even more fascinating.