Barefoot or in sneakers, sticks or GoPro in hand, tourists parade on this cool May morning a few hundred meters from the dune of Pilat, the highest dune in Europe. Whether they came by bus, bike, car or motorhome, they converge on a clear and pearly path made of concrete crushed oyster shells. "They replace all the aggregates, an innovation that reuses a local resource," says the Syndicat mixte which has worked with the Arcachon Aquitaine Regional Shellfish Farming Committee and the University of Pau to give a second life to 60 m3 of shells.
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