Rotterdam

Snorkel the crystal-clear water off Grand Turk, including the edge of the famous wall where the reef drops into the deep blue.

A guided ATV ride past the lighthouse, salt ponds and quiet back roads of this small island, in about 90 minutes.

The easiest way to explore Grand Turk on your own: pick up a golf cart near the cruise center and drive to beaches, Cockburn Town and the lighthouse.

A small-group trip into the only tropical rainforest in the U.S. National Forest system to hike, swim in river pools and ride a natural rock waterslide.

Glide along San Juan's coast with an underwater jet scooter, looking for sea turtles on the reef. Videos of your swim are included, and it takes about 90 minutes.

See the colorful streets, forts and city walls of Old San Juan by golf cart, covering more ground than on foot, just steps from the cruise pier.

Sail on a comfortable catamaran to swim with sea turtles in calm, clear water, then relax at a white-sand beach before heading back to the ship.

A three-hour walk through historic Charlotte Amalie tasting West Indian dishes and local rum, with the story of the island's Danish colonial past along the way.

Ride a guided off-road route through the hills of St. Thomas for big views over the harbor and neighboring islands. About two hours, so it fits an easy port day.

Snorkel alongside wild sea turtles, then relax at Grote Knip, one of Curacao's prettiest beaches. Underwater photos are included.

A small-group day covering Curacao's best: colorful Willemstad, the island's countryside, beaches and lookouts.

Take the wheel of an off-road buggy on dirt trails around Willemstad, with a stop to cool off at the beach.

A small-group boat trip to snorkel two spots in Bonaire's protected marine park, famous for some of the healthiest reefs in the Caribbean.

Race across the flat island on a three-wheeled landsailer powered by Bonaire's steady trade winds. A one-of-a-kind activity with a perfect 5-star rating.

See both ends of Bonaire in three hours: flamingos, salt pans, slave huts and the wild northern coast, with a local guide.

Aruba's most-reviewed tour: drive off-road along the rugged north coast to a hidden beach and a natural cave pool for a swim.

An easy bus tour to the classic sights, including the California Lighthouse, Casibari rock formations, the Alto Vista chapel and the north coast.

Sail along Aruba's calm west coast to snorkel at a shipwreck and coral reef, with lunch and drinks served on board.