Norwegian Cruise Line's latest addition stands out for being able to successfully cater to both adults and kids. The 4,004-passenger Norwegian Bliss features 16 cocktail lounges, breweries and wine bars, as well as nightly musicals, themed shows and parties. The ship is also home to the Mandara Spa and the Observation Lounge, which offers 180-degree panoramic views that are spectacular at sunset. Activities for kids are abundant as well – Norwegian Bliss offers the largest racetrack at sea, an aqua park with a tandem slide that hangs over the ocean and an intergalactic-themed laser tag arena.