A river cruise is a very different experience than one on an ocean liner, the boats are much smaller with a more intimately sized passenger group, the closeness to shore allows for a lot of stops, and many of the boats themselves are the epitome of first class. At the top end of luxury travel are European river cruises, these ships offer the most amazing perks from Michelin-starred chefs on board to on-shore excursions like private museum tours. If you are looking for a truly luxurious vacation, these three river cruise lines can definitely deliver. From Crystal River Cruise's Mozart cruise on the Danube, Uniworld's' brand new Joie de Vivre which cruises the Seine, to the classic Viking, these river cruise lines are sure to please.