Excursion from Civitavecchia allow yourself an hour and half to enter into Rome from the seaport so an early start is advisable to avoid again the long queues that you will encounter in the Vatican, by hiring guide which is ones optional request, then visit the main places of Rome again include the Coliseum the Pantheon and the highlights of Rome, which will allow you to return to the Port of Civitavecchia in time to embark.
Another option that one may consider is a tour to Orvieto which you can reach from civitavecchia this important quaint picturesque town with a history that goes as far as the Etruscan period will give you an opportunity in visiting a part of Italy which is hidden away from the bustling tourist areas.