The Aa is an 80 km long river in northern France. Its source is near the village Bourthes. It flows through the following départements and cities: The Murray River in Australia. ... Bourthes is a commune of northern France, in the département of Pas-de-Calais (zone 62), canton of Hucqueliers, arrondissement of Montreuil_sur_Mer . ... The départements (or departments) are administrative units of France, roughly analogous to British counties. ...

• Pas-de-Calais: Saint-Omer.
• Nord: Gravelines.

The Aa flows into the North Sea near Gravelines. Pas-de-Calais is a département in northern France named after the strait which it borders. ... Saint-Omer, a town and commune of Artois in northern France, sous-préfecture of the Pas-de-Calais département, 42 miles west-north-west of Lille on the railway to Calais. ... Nord (French, the north) is a département in the north of France. ... Gravelines is a small historic town and commune on the northern coast of France on the river Aa 15 miles (25 km) south west of Dunkirk, in the Nord département. ... The North Sea is a sea of the Atlantic Ocean, located between the coasts of Norway and Denmark in the east, the coast of the British Isles in the west, and the German, Dutch, Belgian and French coasts in the south. ...