Taking Fun Ships to new lengths and widths, Conquest-class ships are the largest in the Carnival fleet. They're basically larger and more feature-filled versions of earlier Destiny-class vessels. More space translates into additional decks, an upscale Supper Club, and even more bars and lounges; however, well-proportioned public areas belie the ships' massive size. You'll hardly notice that there's slightly less space per passenger after you take a thrilling trip down the spiral waterslide.