Bordeaux is located close to the European Atlantic coast, in the southwest of France and in the north of the Aquitaine region. It is around 500 km (310 mi) southwest of Paris. 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. Historically the left bank is more developed because when flowing outside the bend, the water makes a furrow of the required depth to allow the passing of merchant ships, which used to offload on this side of the river. In Bordeaux, the Garonne River is accessible to ocean liners. The right bank of the Garonne is a low-lying, often marshy plain.