I went on a 4 hour cruise up the Rhine River which started in Mainz and ended in Koblenz. It could have been longer but it was the last day of the season so a few towns were skipped and another boat finished the route, so instead of taking a train to the next stop and continue up to Cologne, I just opted to take the train straight to Cologne. The river was dotted with a lot of towns and some gorgeous countryside views. The hills were lined with vineyards that made for some wonderful Fall colored landscapes, even with it being cold, rainy and cloudy.
Just a couple of notes, I saw a few barges that had just one car secured on the back of them. It seemed odd but I don’t know the reason for it. Also when we got to Koblenz, they had a massive statue of William I on a horse.