Are there any European River Cruises that are for 4 days?

I can leave from Strausbourg, France or in Germany. Most cruises seem to be for 7 or more days.

Thank you! By smith_nycYou´re right, most cruises are for 7 or more days, or only for one or two hours. But maybe it helps, if you search with the german translation "Flusskreuzfahrt". If you need more help (Esp. with the German), you can contact me under my nickname.