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Built during the first century A.D., the Pont du Gard is an ancient Roman aqueduct that likely went out of use some time during the sixth century and eventually became a toll bridge. The highest elevated Roman aqueduct, as well as one of the best preserved, it crosses the Gardon River located near the southern French town of Vers-Pont-du-Gard, and was built to bring water to the city of Nîmes. With three tiers of arches, the Pont du Gard is 160 feet tall and stands as a testament to Roman ingenuity.