10. Norwegian Cruise Line
Known for its colorful ships, Norwegian Cruise Line first broke into the mega-ship category in 2010 with the launch of Norwegian Epic, which can carry just over 5,000 passengers at full occupancy, and have since introduced five others in the Breakaway and Breakaway-Plus classes. The crowd aboard these vessels, which primarily sail in North America, the Caribbean, and the Mediterranean, often consists of families who take advantage of amenities like waterparks, virtual-reality gaming, and go-kart racing, though the cruise line’s newest ship, Norwegian Bliss, has a decidedly more mature atmosphere. In November 2019, Norwegian expects to launch the next member of its fleet, Norwegian Encore, which will be the most luxurious of its mega-ships.