The ruins of the Roman aqueduct are another interesting attraction to visit in Tarragona. The aqueduct was built by the Romans in the first century AD to supply water to the city of Tarraco, the ancient name for Tarragona.The aqueduct consisted of two lines of pipelines, one underground and one elevated, that carried water from the mountains to the city of Tarraco. The elevated part of the aqueduct consisted of stone arches, which stretched about 25 km through the surrounding countryside.Today, the ruins of the Roman aqueduct are a popular attraction for tourists visiting Tarragona. Most of the arches have collapsed or been destroyed over the centuries, but some sections are still standing and can be visited.One of the most famous sections of the aqueduct is located a few kilometers outside the city of Tarragona, near the town of Les Ferreres. Here is the so-called Pont del Diable (Devil’s Bridge), a 217-meter section of the aqueduct that stretches 27 meters above the Francolí River valley.The Pont del Diable is considered one of the best examples of Roman architecture in Spain and was declared a UNESCO World Heritage Site in 2000 along with other sections of the Roman aqueduct in Tarraco.The ruins of the Roman aqueduct are easily accessible by car or bus from the city of Tarragona. If you are passionate about history and archaeology, the Roman aqueduct ruins are a must-see on your trip to Tarragona.