Royal Caribbean International

For mega-resort fans, there’s nothing quite like a Royal Caribbean vessel. The line’s largest ships are more than 20% bigger than any others afloat, and they feature every type of amusement imaginable, from rock climbing walls and surf simulators to Broadway shows and ice-skating rinks. Families, in particular, will love it. Royal Caribbean sails everywhere in the world, but its heaviest presence is in the Caribbean and Europe.