Fort Boyard is a fort built on Boyard bank, an ocean bank located between the Île-d'Aix and the Île d'Oléron in the Pertuis d'Antioche straits on the west coast of France. From Wikipedia
Funded by the Département de la Charente-Maritime, this dredging phase will clear up to 4,000 m³ of masonry ahead of installing new concrete harbor defenses under strict marine weather limits.
