The Rhine is the longest river in Germany, I unfortunately had a snoring roommate and hadn't slept in days so I did not get to enjoy it as much as I should've because I was starting to get delirious. It was a night cruise and I remember having a couple drinks at sunset seeing the amazing architecture and beauty, but we cruised a small part and it was pretty cool. The river Rhine originates in Switzerland and flows through four countries until it empties into the North Sea after passing the Netherlands. Angie