Set sail on a new ship this year and experience some of the most exciting innovations in cruising. Not only will you get acquainted with first-of-their-kind attractions at sea (how about a death-defying stroll on a walkway that extends over the open ocean?), you'll sleep in bigger and better cabins, feast on meals designed by the hottest star chefs, and enjoy an array of avant-garde amenities. If you've cruised before, a new ship will change the way you view seafaring. And if it's your first time setting sail, these virgin vessels will offer an excellent introduction to the life aquatic. From megaships to yachts to everything in between, here are the most groundbreaking ships setting sail this year.