The Pont du Gard is an ancient Roman aqueduct bridge which was built in the first century AD. It was used to carry water over 31 miles to the Roman colony of Nemausus (Nîmes today). It is the tallest of all Roman aqueducts as well as one of the best preserved. It was added to UNESCO's list of World Heritage sites in 1985 because of its exceptional preservation, historical importance and architectural ingenuity. You'll be able to walk on the XVIIIth century Pitot Bridge parallel to the Pont du Gard from which you'll no doubt take wonderful photos.