Where you're headed: Eastern Caribbean
With stops in St. Martin, St. Thomas, and Princess Cays, this itinerary promises plenty of opportunities for sunny, active fun: Snorkeling, sunbathing, hiking, biking, and beachcombing, just for starters. On Princess Cays, the line’s private island, you can rent a sailboat, a transparent-hull kayak, an Aqua Bike, a paddleboator, if you’re seeking peace and quiet, a cozy cabana.