ITALY ITINERARY HELP PLEASE!

Personally, I think there's plenty in Florence to fill your three days - especially if you are arriving in the city that first day. It may depend on your interests, though? I'm a huge fan of Italian Renaissance art, and there's just oodles of that to see there!

But if you do go the C.T. I would definitely take the train. You cannot drive into most of the villages, and parking can be a real headache. If you must drive, park it in La Spezia and take the train in.

Thank you so much!

Three days in Florence will barely scratch the surface. I would consider staying in Florence for the entire three days. It would almost be redundant to go to Cinque Terre since you're going to the Amalfi Coast. It would take away too much time from Florence which is amazing. You'd be spending too much time on the train, when you could be exploring what Florence has to offer.

As noted above, you may have different interests, but the Cinque Terra are nice for more than just a quickie part-of-a-day side trip visit. I haven't been back since the devastating floods from a couple of years ago, so it would be nice to see how things have recovered in the towns that were hardest hit, but you'll be heading to another oceanside location anyway at the Amalfi Coast. You could compare one seaside location with another if you also visited the C.T., but if you're looking for a day trip out of Florence, how about Siena? Buon viaggio!

If you feel satisfied with what you've seen in the first two days in Florence, then Siena would be my first choice of side trip, both for proximity and plenty to see in one day.