This 2.5m-high, 20km-long dyke was built in the 19th century to cut the delta off from the sea, making the southern Camargue arable. A walking and cycling track runs along its length, linking Stes-Maries with the 1882 lighthouse Phare de la Gacholle, some 12km away. The trail continues another 17km to Salin de Giraud. Footpaths cut down to lovely sandy beaches and views of pink flamingos strutting across the marshy planes are second to none.
Walking on the fragile sand dunes is forbidden, as is driving.
