Editor's note: Crystal Serenity and Crystal Symphony were bought by Abercrombie & Kent and will re-enter service in 2023 following a refurbishment.
The larger of Crystal Cruises’ luxury ships, the 1,070-passenger Crystal Serenity is still technically midsize but has lots of big-ship attributes. Passengers dine on excellent cuisine served with complimentary wine, get a whole menu of entertainment options including a piano bar and after-dinner dancing, and can stay in some of the best penthouse suites at sea. Frequent refurbishments, including a redo of the pool deck, have kept the ship fresh and the vibe appealingly contemporary.