Felsen is an imaginary town in the German Mosel valley somewhere between Koblenz and Trier.

The area is predominantly wine growing and the small town plays a part in this industry.

The double track main line, set in the late 1950's and early/mid 1960's, carries trains on German domestic services and some international through workings to and from France and Luxembourg. Most trains are steam operated but diesels are starting to appear as substututes for steam locomotives on some mainline trains and in the form of railcars on local services.