AMADEUS River cruises is a family owned European company with over 40 years of experience in river cruising in our own backyard through the Rhine, Main, Danube, Moselle, Rhone and Seine Rivers.AMADEUS River cruises is a family owned European company with over 40 years of experience in river cruising in our own backyard through the Rhine, Main, Danube, Moselle, Rhone and Seine Rivers.