Silversea launched seven fall S.A.L.T. Grape Harvest sailings built entirely around European food and wine — nine-course dinners at La Dame, a Bordeaux tasting led by the head sommelier, and shore experiences like a château truffle hunt you couldn't book on your own. It's a shoulder-season, food-forward play on just two ships (Silver Dawn and Silver Spirit), so inventory is limited.

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Royal Caribbean's Icon of the Seas tops the list — its six-slide Category 6 park includes Frightening Bolt, billed as the tallest drop slide at sea. We rank the biggest slide decks across Royal, MSC (Venom Drop), Norwegian (the Aqua Slidecoaster), and Carnival, with the height rules worth knowing before you book.