Berlin-Wannsee station (in German Bahnhof Berlin-Wannsee) is a railway station opened in 1874 which lies in the Wannsee district of Berlin, the capital city of Germany. It is an important traffic junction in south-west Berlin that is served by the RegionalExpress and RegionalBahn trains of the Deutsche Bahn, the Harz-Berlin-Express of Veolia Verkehr and by the Berlin S-Bahn.