The Moselle is a river that rises in the Vosges mountains and flows from western Germany through Luxembourg, and north-eastern France. It is a left bank tributary of the Rhine, which it joins at Koblenz. A small part of Belgium is in its basin as it includes the Sauer and the Our.
Its lower course "twists and turns its way between Trier and Koblenz along one of Germany's most beautiful river valleys." In this section the land to the north is the Eifel which stretches into Belgium; to the south lies the Hunsrück. The river flows through a region that was cultivated by the Romans. Today, its hillsides are covered by terraced vineyards where "some of the best Rieslings grow". Many castle ruins sit on the hilltops above wine villages and towns along the slopes. Traben-Trarbach with its art nouveau architecture and Bernkastel-Kues with its traditional market square are two of the many tourist attractions on the Moselle river.