It’s no surprise that last year, Carnival carried approximately 5,000,000 passengers, 800,000 were children. Outside, above the lido deck of the Carnival Horizon, a 455-foot-long water tube is a part of the Dr. Seuss-themed water park, which looks like a blast for kids and adults alike. The new ship also boasts an 800-foot-long sky ride around its top deck and, on the inside, an IMAX Theater. Like other Carnival ships, Horizon has a range of other deck-top fun zones, eateries, bars, and entertainment.