Bordeaux by Gironde Estuary, France44.8N 0.5W
Here, sediments from the Gironde Estuary create paisley patterns in the waters of the Bay of Biscay, off the west coast of France. The Gironde is a navigable estuary, formed from the meeting of the rivers Dordogne and Garonne just below the centre of Bordeaux (visible at the bottom edge).
The Gironde is approximately 65 km (40 mi) long and 3–11 km (2–7 miles) wide. Covering around 635 km2 (245 sq mi), it is the largest estuary in western Europe. The Gironde is subject to very strong tidal currents and great care is needed when navigating.
Bordeaux is located close to the European Atlantic coast, in the southwest of France and in the north of the Aquitaine region. The city is built on a bend of the river Garonne, and is divided into two parts: the right bank to the east and left bank in the west. The left bank of the Garonne is a low-lying, often marshy plain.