the Rhine River . Some of communities included in this area are Bacharach , Bad Honnef , Boppard , Braubach , Drachenfels , Kaub , Koblenz , Königswinter , Niederlahnstein , Oberlahnstein , Oberwesel , Remagen , Sankt Goar , Sankt Goarshausen , Spay , Unkel . · Mosel-Saar-Ruwer The Mosel-Saar-Ruwer