Köln-Düsseldorfer is mostly a sensible choice for working day cruises about the Rhine. KD has the biggest number of departures undoubtedly of all Rhine pleasure boat strains. If you do all the loop (out of your starting point and back) the complete loop will take close to two hours. https://knoxjymam.blogitright.com/18408421/the-definitive-guide-to-river-cruise-seine-river