Over the Garonne.By boat or on foot, follow the Agen Aqueduct and discover its secrets. Built in the 19th century, this bridge allows the Canal de Garonne to cross the Garonne river, linking the Atlantic to the Mediterranean, thus allowing boats to avoid having to circumnavigate the entire Iberian peninsula.Today the canal's traffic mainly consists of pleasure boats. You'll get an entirely different view of Agen and the surrounding area from this watery flyover.