Westphalia is a region of northwestern Germany and one of the three historic parts of the state of North Rhine-Westphalia. It has an area of 20,210 km2 (7,803 sq mi) and 7.9 million inhabitants.
North Rhine-Westphalia, commonly shortened to NRW in both written and spoken language, is the most populous of the 16 states of Germany.
The Sieg is a river in North Rhine-Westphalia and Rhineland-Palatinate, Germany. It is a right tributary of the Rhine.
The Aabach is a 14-kilometre-long (8.7 mi) river in Germany, a left tributary of the river Afte. It rises near the village Madfeld, part of the town Brilon, in eastern North Rhine-Westphalia near the border with Hesse. From there it flows north between mountains up to 503 metres (1,650 ft) high through a forested landscape, partly in the natural park Diemelsee. After a few kilometers it flows into the artificial lake Aabachstausee. It flows to the north and empties only about 3.5 kilometres (2.2 mi) further north after Bad Wünnenberg, where it flows into the Afte.
The Düssel is a small right tributary of the river Rhine in North Rhine Westphalia, Germany. Its source is east of Wülfrath. It flows westward through the Neander Valley where the fossils of the first Neanderthal man were found in August 1856. At Düsseldorf it forms a river delta by splitting into four streams, which all join the Rhine after a few kilometres. The Nördliche Düssel flows through the Hofgarten and passes under the Golden Bridge.
The Kyll, noted by the Roman poet Ausonius as Celbis, is a 128-kilometre-long (80 mi) river in western Germany, left tributary of the Moselle. It rises in the Eifel mountains, near the border with Belgium and flows generally south through the towns Stadtkyll, Gerolstein, Kyllburg and east of Bitburg. It flows into the Moselle in Ehrang, a suburb of Trier.
The Münstersche Aa is a river in the Münster region of Westphalia in Germany. It is a left tributary of the Ems. The Münstersche Aa begins near Havixbeck, flows southeast until Münster, and then north to Greven, where it flows into the Ems. The total length of the Münstersche Aa is about 43 kilometres (27 mi).
Speller Aa is a river of North Rhine-Westphalia and Lower Saxony, Germany. It flows into the Große Aa near Lünne.
Neerdar is a river of North Rhine-Westphalia and of Hesse, Germany. It is a left tributary of the Wilde Aa near Korbach.
Wilde Aa is a river of North Rhine-Westphalia and Hesse, Germany. It flows into the Orke near Lichtenfels.
Aa is a river of North Rhine-Westphalia, Germany. It is a left tributary of the Werre, which it joins in Herford. It is formed by the confluence of two small streams in Bielefeld-Milse. In its upper part, it is called Johannisbach.
Dreierwalder Aa is a river of North Rhine-Westphalia, Germany. It flows into the Speller Aa in Spelle.
Kinderbach is a river of North Rhine-Westphalia, Germany. It flows into the Münstersche Aa north of Münster.
Kleine Aa is a river of North Rhine-Westphalia, Germany, a tributary of the Aabach. Thus it is part of the Rhine River Basin.
Lutter is a river of North Rhine-Westphalia, Germany. The river Aa is formed at its confluence with the Johannisbach.
Meckelbach is a river of North Rhine-Westphalia, Germany. It flows into the Münstersche Aa southwest of Münster.
Schaler Aa is a river of Lower Saxony and North Rhine-Westphalia, Germany. It flows into the Große Aa south of Freren.
Schwarzbach is a river of North Rhine-Westphalia, Germany. It is a right tributary of the Johannisbach, that in the lower course is called Aa.
Steinfurter Aa is a river of North Rhine-Westphalia, Germany. It flows through Steinfurt, and joins the Vechte near Wettringen.
Eltingmühlenbach is a river of Lower Saxony and North Rhine-Westphalia, Germany. It flows into the Glane near Greven. On its course from near Bad Iburg to the southwest, it assumes several names: Glaner Bach, Oedingberger Bach and Aa.
