What cruise line is best for young adults that want to travel Europe?

I would highly recommend Royal Caribbean, as they cater well for children and there are many itineraries provided in the Mediterranean. I would also recommend Holland America Line as their ships are very nice and traditional if that is what you want, however there are many people from a gone-by era onboard, they have quite good youth facilities though, there are also several itineraries provided in the Mediterranean. If you are able to afford it I would take Silversea as they have many exquisite one-way and roundtrip itineraries in Europe and are very welcoming, you can choose what you wear at all dinners(beneficial for children), however there are not many other children onboard.I would strongly recommend not to take Carnival Cruise Line or Norwegian Cruise Line as they have farely differed from the true experience witnessed when traveling on an ocean liner, there is no atmosphere, no culture and no class-in my view.

I went on a Carnival Cruise to Alaska, and I absolutely loved it. I think Carnival is a great cruise line. The food is really good, not just crappy boat food. The staff were all very nice. The cabin was small but that was okay because I really didn't spend much time in it. If you want to look into anything else, Norwegian Cruise Line might have something. But if you find nothing else, I don't think you'll be disappointed with Carnival.