To move from the Civitavecchia to Pisa, take a regional train from Civitavecchia station, which will take approximately 30 minutes. A one-way train ticket costs around €5-€10. To reach Florence from Pisa, it takes approximately an hour and a half by train, and a one-way ticket costs between €8-€20, depending on the train you choose. Finally, to explore Civitavecchia, rent a car or take a taxi, as there is no train service within the town.
If you have an extra day, consider visiting the church of St. Peter's Basilica or the Vatican Museum in Rome, both of which are less than two hours away by car or train. Alternatively, you can extend your stay in Florence and visit the magnificent Duomo Santa Maria del Fiore and climb to the top for panoramic views of the city. On the other hand, if you have less time, consider skipping the Boboli Gardens in Florence or the National Archeological Museum of Civitavecchia.