The ancient Roman bridge-aqueduct in southern France that crosses the Gardon River is the Pont du Gard.
Built in the first century AD, the Pont du Gard formed part of an approximately 50-kilometre aqueduct that carried water to the Roman city of Nemausus, now Nîmes. Its three tiers of arches allowed the water channel to maintain a gentle gradient across the valley.
The structure reaches about 49 metres above the river and is made largely from locally quarried limestone. The lowest level also served as a road crossing, while the uppermost level carried the aqueduct channel.
The Pont du Gard is often called simply a Roman bridge, but its primary purpose was water transport. It became a UNESCO World Heritage Site in 1985 and remains one of the best-preserved major Roman aqueduct bridges. It is not the same monument as Spain’s Aqueduct of Segovia, which supplied ancient Segovia.