19-deck mega-ship carrying about 4,500 people; features "Priscilla, Queen of the Desert" stage show, the Beatle's-inspired Cavern Club lounge and solo cabins.

An NYC-themed mega-ship, carrying some 4,500 cruisers; highlights include outdoor restaurant seating, a ropes course, multistory water slides and 18 dining venues.

Freestyle cruising means lots of choice for free and for-fee dining, drinking and entertainment, and no set dining times; holds some 3,000 cruisers.

A Miami-themed megaship, holding some 4,500 cruisers; features outdoor restaurant seating, a ropes course, multistory waterslides and 18 dining venues.

Launched in 2001, 2,348-passenger Norwegian Star was the first Norwegian ship custom built for Freestyle Cruising, which touts a plethora of dining, cabin and entertainment options.

More than 10 restaurants offer everything from a traditional steakhouse to Brazilian and Japanese; entertainment includes The Second City comedy; holds some 3,000 cruisers.

Freestyle cruising means two dozen free and for-fee restaurants and bars to choose from, plus no set dining times or assigned tables; holds about 3,000 cruisers.

The year-round, all-Hawaiian island itineraries are the ship's main draw; also offers nearly a dozen free and for-fee dining options; can hold near 3,000.

Carries some 4,500 people; features Broadway-style entertainment, an expansive ropes course and 17 restaurants including the first at-sea Margaritaville.

Plenty of eateries, bars and daily activities keep this 3,000-passenger ship hopping; often chartered for music and pop culture theme cruises.

Norwegian Spirit debuted in 1998, so you won't find a rock climbing wall or bowling alley, but enjoyment doesn't always have to come in an ultra-modern package.

One of Norwegian's oldest, smallest ships; main attractions are the 24/7 open bar on its three-night Bahamas cruises and four-night sailings to Cuba.

One of Norwegian's smaller ships, yet offers more than 10 free and extra-fee restaurants, plus big-stage production shows and two pools; carries just over 2,000 passengers.

Laidback 3,000+ passenger ship with more than 10 free or for-fee restaurants featuring everything from a traditional steakhouse to French and Japanese; full schedule of daily activities.

Norwegian's newest ship, which will sail in Alaska and Caribbean, launches June 2018; highlights include 82 solo cabins with virtual ocean views and a massive observation lounge.

Norwegian Joy was purpose built for the Chinese market and sails in China full time.