The Ahr valley (, ) is named after the Ahr, a left tributary of the Rhine in Germany. It begins at the Ahr spring (Ahrquelle) in Blankenheim in the county of Euskirchen (North Rhine-Westphalia) and runs generally eastwards. At its southernmost point it enters the county of Ahrweiler, and hence the state of Rhineland-Palatinate. Running through the collective municipality of Adenau the valley bends northeast at its confluence with the Adenauer Bach and reaches the collective municipality of Altenahr, from where it resumes its characteristic west to east course, albeit interrupted by meanders. Here begins the section that is known as the Ahr valley (Ahrtal) in a touristic sense. Here it is characterized by vineyards on the south-facing slopes and a picturesque rocky landscape, carved out by the river creating a 300 metre deep gorge in the Ahr Hills. In the next stage the Ahr reaches the area of the county town of Bad Neuenahr-Ahrweiler, before finally discharging into the Rhine south of Remagen in the borough of Sinzig. Course Upper Ahr valley From its head, the Ahr valley runs through a rolling uplands with pastures, woods and occasional hamlets or farmsteads. It is followed by the B 258 federal highway. The first noteworthy villages are Ahrhütte and Ahrdorf, in the municipality of Blankenheim. The Ahr valley then becomes gradually narrower and reaches its southernmost point where it leaves the state of North Rhine-Westphalia. The first village in Rhineland-Palatinate that it encounters is Dorsel, on the heights above the valley. In Müsch the B 258 leaves the Ahr valley, and the L 73 then accompanies the river, which is still small at this stage. From here the valley runs through Antweiler to Fuchshofen, almost northwards, before swinging almost due east from Schuld, passing Insul and reaching Dümpelfeld where it is joined by the B 257. Here, at its confluence with the Adenauer Bach, coming from the south, the Ahr heads northeast, leaves the collective municipality (VG) of Adenau and reaches the collective municipality village of Altenahr south of Liers, which belongs to Hönningen gehörenden. This is now the middle course of the Ahr, the Mittelahr. Middle Ahr valley The valley runs initially northeastwards from Hönningen via Ahrbrück, Pützfeld, Kreuzberg and Altenburg to Altenahr. From Ahrbrück the B 257 is joined by the Ahr Valley Railway which follows the valley to the Rhine. At Altenahr the valley bends east and initially