This was one giant viaduct We had to make a visit to this marvelous viaduct that started with the state of the Art Museum which can eat up a great deal of your time because its huge and very well worth spending a few hours if not all day learning about. A lovely path leads to this aqueduct which until a few year ago was a actual road. This perfectly preserved Roman Aqueduct was built in about 19 B.C. as the critical link of a 30 mile canal that, by dropping one inch for every 350 feet, supplied nine million gallons of water per day ( about 100 gallons per second) to Nimes- one of ancient Europe's largest cities. Though most of the aqueduct is on or below the ground, at Pont du Gard it spans a canyon on a massive bridge-one of the most remarkable surviving Roman Ruins anywhere. Ron and I ended up hiking up to the highest level to get superb viewpoint views and photos. We also saw where the aqueduct meets a rock tunnel. Truly a must see if you are visiting in this area.