Gironde estuary
…the centre of Bordeaux. Covering around 635 km2 (245 sq mi), it is the largest estuary in Western Europe. Giving its name to the French département Gironde, the Gironde estuary is approximately 75 km (47 mi) long and 3–12 km (1.9–7.5 mi) wide. It is subject to very strong tidal currents and great care is…