On day five, visit the iconic Castel Sant'Angelo, located just a short distance from Saint Peter's Church. This ancient fortress has a rich history and offers panoramic views of the city. Explore the castle's interior, which houses a museum showcasing its fascinating past. Walk along the ramparts and enjoy the breathtaking views of the Tiber River and the surrounding cityscape. End your day with a romantic dinner at one of the nearby restaurants, savoring delicious Italian cuisine.