Ostia is in Lazio, Italy, close to Rome's major airport of Fiumicino. This article covers both the archaeological site Ostia Antica at the south-western end of Rome's district with the same name, and the nearby beach area Lido di Ostia (or simply Ostia).
Not far from the center of Rome is Ostia Antica, an archaeological site that contains many Roman ruins, dating back to the days when it served as Rome's port (a function now taken over by Civitavecchia). In antiquity is was situated at the mouth of the river Tiber, however the shoreline moved seawards, due to silting, from the Middle Ages until the 19th century. Ostia Antica is today still lying next to the Tiber, but at a distance of some three kilometers from the beach. It is one of Lazio's major attractions, less crowded and, for some, more enjoyable than the ruins of Pompeii. So if you can't make it down to Pompeii don't worry. Just head out to Ostia Antica.
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