Briare aqueduct
Saint-Firmin-sur-Loire, France
The Briare Aqueduct in central France carries the Canal latéral à la Loire over the river Loire on its journey to the Seine. It replaced a river-level crossing from the canal to meet the Briare Canal that was hazardous in times of flood. Between 1896 and 2003 it was the longest navigable aqueduct in the world, until the opening of the Magdeburg Water Bridge. It is part of the Canal latéral à la Loire, not, as is commonly believed, the Briare Canal.
Canal data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).