As the smallest and oldest ship in Norwegian Cruise Line's fleet, 2,018-passenger Norwegian Spirit is in a class by itself, literally – it's the only ship in the Spirit class. Although it was built in 1998, Norwegian Spirit recently underwent a massive $100 million refurbishment that gave it the gloss of a brand-new ship. Technical parts were updated in 2017 and a bow-to-stern interior transformation in 2020 has made it a haven for cruisers seeking a grown-up onboard ambience. While Norwegian Spirit doesn't have the amusement park-style attractions of the line's newer vessels, its modernized staterooms, redesigned bars and lounges, fresh dining concepts and expanded Mandara Spa deliver a solid mid-size ship experience without the megaship crowds.