Les Écluses de Fonseranes
Just two kilometres west of Béziers' centre, the Canal du Midi climbs a limestone escarpment via nine consecutive lock chambers — a feat of 17th-century engineering so audacious that UNESCO made it a World Heritage Site. Stand at the top lock at dawn and watch the still water reflect a procession of narrowboats inching upward through the mist.
Engineering Genius You Can Walk On
Pierre-Paul Riquet completed this staircase of locks in 1679 to lift barges nearly 22 metres in a single fluid sequence. The elliptical lock chambers, lined with dressed stone and shaded by centuries-old plane trees, are still fully operational today and handle hundreds of pleasure boats each season.
A towpath runs the entire length of the staircase, and you are free to wander alongside the locks as boats pass through. Lock-keepers work the gates by hand much as they did in the 17th century — watching a 15-metre barge squeeze through a chamber with centimetres to spare is unexpectedly thrilling.
Beyond the Locks: The Water Slope
Beside the historic locks, an experimental pente d'eau (water slope) built in the 1980s offers an alternative — boats float onto a moving water trough that slides them up the hill on a cushion of water. It operates only in summer and is one of the few such structures in the world still in use.
A small visitor centre at the bottom explains the canal's history with bilingual panels, and a café with a terrace overlooks the lowest lock — the perfect spot for a cold Peroni and a crêpe while boats queue to enter.
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