If there's one thing that Italy has no shortage of, it's ancient Roman ruins. While there are many to see in the center of Rome, Ostia Antica is home to an incredible excavation site that was once the most important port city of the Roman Empire. The city dates back all the way to 7th century B.C. although some of the items uncovered at the site can be dated back all the way to the 3rd century B.C.

Ostia Antica is just a short ride away from the Porta San Paolo/Piramide station on the Roma-Lido train. Some of the sights to see in the ancient port city include mysterious travertine stones, ancient graffiti, and even the remains of a Roman bakery.