Picture yourself at the helm of your boat when the landscape suddenly changes. You are no longer cruising between fields and plane trees, but above a river, a road or a railway line. This astonishing, almost unreal sensation is exactly what canal aqueducts offer.
True feats of engineering, navigable aqueducts are among the most spectacular structures of France’s waterway heritage. In this guide, discover how they work and set off to meet the five most beautiful canal aqueducts in France, to admire or to cross on a license-free boat with Riverly.
What is a canal aqueduct?
In short: A canal aqueduct is a bridge that carries a canal over an obstacle.
A canal aqueduct is an exceptional engineering structure designed to let an artificial waterway cross an obstacle at height: another river, a deep valley, a railway line or a road.
Unlike natural rivers, which follow the valleys, man-made canals must keep a constant water level to guarantee boats’ safety. When engineers came across a major break in the terrain or a river blocking the way, they built these bridges to carry the canal from one bank to the other.
The great technical achievement of a canal aqueduct lies in the watertightness and strength of its trough, which must bear the weight of thousands of tonnes of water without ever weakening the piers that support the whole structure.
What are the most beautiful canal aqueducts in France?
The French waterway network is full of these architectural treasures, built mainly in the 18th and 19th centuries. Here are the five unmissable canal aqueducts to add to your travel plans for a cruise in France.
1. The Briare Aqueduct (Loiret): the most famous in France
Located in the Centre-Val de Loire, the Briare Aqueduct is without doubt the most majestic in the country. At 662 metres long, it held the world record for the longest metal canal aqueduct for more than a century.
Built between 1890 and 1896, this exceptional structure put an end to a particularly perilous crossing: that of the Loire riverbed, whose sudden floods and sandbanks made navigation unpredictable. Gustave Eiffel’s workshops took part in its construction, while the engineer Léonce-Abel Mazoyer designed the metal structure. Its 72 neo-Louis XVI lampposts give it a unique look, particularly striking at nightfall.
2. The Agen Aqueduct (Lot-et-Garonne): the longest masonry aqueduct in Europe
The second-longest canal aqueduct in France at 539 metres, the Agen Aqueduct holds a unique title: the longest masonry canal aqueduct in Europe. This monumental structure carries the Canal de Garonne over the river of the same name into the heart of Agen.
Built entirely of white dressed stone from the Quercy, it rests on 23 successive arches. Construction began in 1839 and suffered major delays caused by the Garonne’s floods, before it opened to navigation in 1856. The contrast between the calm waters of the canal and the power of the river below is striking.
3. The Digoin Aqueduct (Saône-et-Loire): one of the oldest
In the heart of Burgundy, the Digoin Aqueduct is one of the oldest major canal aqueducts in France. Opened in 1838, its 243 metres carry the Canal latéral à la Loire over the Loire to join the Canal du Centre.
Built of dressed stone and carried by eleven arches, it was widened in 1870 so that Freycinet-gauge barges could pass each other. Crossing this aqueduct offers a splendid panorama over the islands of the Loire and the surrounding wildlife. Its towpaths are also part of the famous Loire à Vélo cycle route, creating a lively meeting point for boaters and cycle tourists.
4. The Cacor Aqueduct in Moissac (Tarn-et-Garonne): the most colourful
The Cacor Aqueduct is an architectural gem tucked away in Moissac. At 356 metres long and supported by 13 arches, it carries the Canal de Garonne over the Tarn.
This aqueduct stands out immediately for its palette of colours: unlike its white-stone or steel counterparts, it is built of the red brick typical of the Toulouse area, which contrasts beautifully with the white stone of the cutwaters. Built in 1845, it withstood the terrible flood of 1930 that devastated the region. Cruising across it is spectacular, as the Tarn is particularly wide at this point.
5. The Répudre Aqueduct (Aude): the oldest in the world
For this last masterpiece, head for the Canal du Midi, a UNESCO World Heritage Site. Near the village of Paraza, the Répudre Aqueduct is quite simply the oldest canal aqueduct in France and one of the very first ever built in the world.
Designed by Pierre-Paul Riquet and completed in 1676, this aqueduct allowed the canal to cross the Répudre, a stream prone to sudden, violent winter floods. More modest in size than the giants of Briare or Agen, cruising over its single arch of local stone is a special feeling: that of floating in the footsteps of the 17th-century pioneers of river transport, surrounded by vineyards and the song of the cicadas.
Summary: the 5 great canal aqueducts of France
| Aqueduct | Canal | River crossed | Length | Material |
|---|---|---|---|---|
| Briare | Canal latéral à la Loire | The Loire | 662 m | Steel / Masonry |
| Agen | Canal de Garonne | The Garonne | 539 m | White dressed stone |
| Le Cacor | Canal de Garonne | The Tarn | 356 m | Toulouse red brick |
| Digoin | Canal latéral à la Loire | The Loire | 243 m | Dressed stone |
| Répudre | Canal du Midi | The Répudre | 135 m | Local stone |
How can you cruise across these aqueducts with Riverly?
To cross these masterpieces of waterway heritage, you simply need to choose the right starting point. The Riverly fleet is spread across several key regions of the French network.
- Briare Aqueduct: from our bases in Burgundy, you cruise through the vineyards of the Centre-Val de Loire before the breathtaking crossing high above the river.
- Digoin Aqueduct: in the heart of Burgundy, an idyllic route that is ideal for combining cruising, local food and bike rides along the greenway.
- Agen and Cacor aqueducts: in a single loop on the Canal de Garonne, setting off from our bases in the South-West, you cross the 23 white stone arches of Agen and the red brick of Le Cacor, starting from our base at Buzet-sur-Baïse.
- Répudre Aqueduct: on the legendary Canal du Midi, set off from our bases in the Camargue and cruise beneath the umbrella pines to this world elder of waterway engineering, a stone’s throw from the village of Paraza. It is also a chance to visit the 9 Fonseranes Locks!
Whether you choose gentle Burgundy, the sunny landscapes of the Canal du Midi or the character of the South-West, the canal aqueducts of France promise unique and unforgettable stopovers. Renting a license-free Riverly boat means crossing these historic monuments yourself, at your own pace, and deciding democratically who will be captain for the crossing!
Key takeaways
- Canal aqueducts are engineering structures that allow a canal to cross a valley, a river or a road.
- France has five iconic canal aqueducts:
- Briare Aqueduct (662 m): the longest metal canal aqueduct in the world.
- Agen Aqueduct (539 m): the longest masonry canal aqueduct in Europe.
- Digoin Aqueduct (243 m): one of the oldest in France.
- Cacor Aqueduct (356 m): recognisable by its red brick structure.
- Répudre Aqueduct: the oldest canal aqueduct in France, designed by Pierre-Paul Riquet on the Canal du Midi.
- With Riverly, you can cruise on a license-free boat and cross these iconic structures from bases in Burgundy, the South-West or the Camargue.
FAQ
Can you cross a canal aqueduct on a license-free boat?
Yes. Most of the great French canal aqueducts can be crossed on a license-free boat as part of a river cruise. After a short introduction, you can take the helm and cross these structures in complete safety. With Riverly, several routes take you across the Briare, Digoin, Agen, Le Cacor and Répudre aqueducts.
What is the difference between a canal aqueduct and a water aqueduct?
A canal aqueduct is designed for boats: it carries a canal over an obstacle. A water aqueduct, by contrast, only carries drinking or irrigation water and is not navigable. Both rely on the same principle of spanning an obstacle, but they are used for entirely different purposes.
Which is the most beautiful canal aqueduct to visit in France?
It all depends on the experience you are looking for. The Briare Aqueduct is the most spectacular, with its metal structure and its crossing high above the Loire. Agen impresses with its 23 stone arches, while the Cacor Aqueduct charms with its red brick. History lovers will prefer the Répudre Aqueduct, the oldest in France, built in the 17th century on the Canal du Midi.
