We will have a full day (7 am - 7:30 pm) port stop in Naples next month. As I've already visited Pompei, Positano, Sorrento, Amalfi, etc., I was considering visiting Herculaneum and Caserta. Knowing that they are in opposite directions, I'm not sure that would be a good use of our time in Naples. I've read that 2 hours is plenty of time to spend at Herculaneum, but with travel time, I'm wondering if logistics make this plan not a good idea since I also read that a good many hours can be spent at the palace and gardens at Caserta. With the long port stay, I've considered the Archaeology Museum and time exploring Naples as an alternative to the additional train trip to Caserta after Herculaneum since in my previous visit to Naples, we didn't spend much time in the city itself. I'd hate to miss Caserta this trip in case I don't make it back to Naples any time soon, but am wondering if I should reduce my ambitions... Any advice on how to best spend our time would be appreciated. As far as interests, we are very open... museums, activities, seeing notable landmarks, etc. are all possibilities. Thanks in advance for any suggestions.