On your third day, take a day trip to the nearby city of Ravenna, known for its stunning Byzantine mosaics. Start your day by visiting the Basilica di San Vitale, a UNESCO World Heritage site famous for its intricate mosaics. Next, explore the Mausoleum of Galla Placidia, another beautiful example of Byzantine art. Don't miss the Basilica di Sant'Apollinare Nuovo, which features a long row of mosaics depicting biblical scenes. For lunch, try some local seafood dishes at one of the charming restaurants in Ravenna. In the afternoon, visit the Dante Museum, dedicated to the famous Italian poet Dante Alighieri. End your day with a leisurely stroll through the historic center of Ravenna, admiring its beautiful architecture and charming streets.