Gignac Bridge carries the N109 road over the river Hérault, 1 km west of the town of Gignac in the Hérault département of France. It is described by a plaque on the side as "Judged the most beautiful bridge of the 18th century", a view shared by the Michelin Green Guide which describes it as "considered to be the finest 18C bridge in France because of its daring design and the beauty of its architectural lines."
Gignac Bridge has been protected since 1950 as a monument historique by the French Ministry of Culture.
Wikipedia https://en.wikipedia.org/wiki/Gignac_Bridge
Address Pont de Gignac, 34150, France
Coordinates 43°39'13.235" N 3°32'8.223" E