and Heppenheim. · Mittelrhein The Mittelrhein region stretches from Bingen to Bonn along 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