Schengen is a small wine-making village and commune in far south-eastern Luxembourg, on the western bank of the river Moselle. The commune border includes the tripoint where the borders of Germany, France, and Luxembourg meet.

The Moselle is a river that rises in the Vosges mountains and flows through north-eastern France and Luxembourg to western Germany. 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.