Day trip to Amalfi Coast?

Can do in one day via train but there is much to see in amalfi. Driving the coast is like the old wild maus ride at pontchartrain beach but with better views

Definitely NOT a day trip. It's at least an hour by train (and more likely 1.5 hrs) to Naples, and then you'll need a driver for the additional 1.5 hrs to Amalfi/Posi/any of the other towns. If you can spare two days, it might be a nice bookend to a trip. But it's not worth rushing down there just to rush back.

If you're staying in Rome proper, consider shorter day trips outside the city. Ostia Antica is an archaeological site, the old port of Rome at the mouth of the Tiber, that allows you to walk the streets of the town. It has ruins of a bath with grand mosaic floors, an ampitheater, scores of shops, a bakery, a small museum...and it is easily reached by train from Rome in 45 mins or so.

Another good day trip from Rome is Tarquinia, where you can visit excavated Etruscan tombs (the Etruscans predate the Greeks/Romans on the Italian peninsula). Again, easily reached by train & a short bus into town center, then a 10 minute walk.

Finally, if renting a car, you could visit the Castelli Romani region just south of Rome....the area produces Frascati wines, so there are wineries to visit, as well as the Villa Barberini gardens at Castel Gandalfo (the pope's summer retreat). This area is harder to reach using public transit, though it can be done. Car makes it easier to get to the wineries. If you do visit the Castelli Romani, I can recommend Osteria il Bersaglieri, in Colonna.

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