Your tour starts at a meeting location in Rome, where you’ll meet your guide, who provides your round-trip train ticket. Then hop aboard the train for the ride southwest of Rome to Ostia Antica, which lies near the coast. When you arrive, take a 2.5-hour leisurely walking tour through the ancient ruins, noting their highly preserved state for which this archaeological site is so renowned. Dating as far back as the 4th century BC, the ruins include structures like an amphitheater, the Forum of the Corporations, the Collegiate Temple, taverns and public baths. Once home to more than 100,000 people, Ostia was the port city of Ancient Rome. Walk along the main road, Decumanus Maximus, while your guide tells you stories about life in town. Admire the intact Roman statues that line the walkways; pass by the Baths of Neptune, crowned by a mosaic that depicts the Roman god of the sea behind a 4-hourse chariot; and take a seat in the amphitheater, which dates back to 12 BC and was built to hold 3,500 spectators. Shops and apartments make up some of the smaller buildings. When your time at the site is up, you’ll return to Rome by train.