Seven Seas Mariner

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.

Circle all of Antigua by speedboat, stopping to snorkel, swim at Stingray City and see Devil's Bridge and the island's quiet bays from the water.

A guided drive to the island's highlights, including Nelson's Dockyard, the view from Shirley Heights and some of Antigua's famous beaches.

Zip around Antigua in an open-air tuk-tuk, through the rainforest and on to a couple of beaches, for a fun, laid-back half day.

St. Lucia's most-booked tour: drive through villages and rainforest to Soufriere and the Pitons, see the drive-in volcano, then cruise back along the coast.

A two-hour ATV ride over hills and through banana plantations with sweeping island views.

Soak in the warm volcanic mud baths at Sulphur Springs, then rinse off at a waterfall in the rainforest. A perfect 5-star rating from hundreds of travelers.

Barbados' most-booked trip: sail the west coast, swim with sea turtles, snorkel over shipwrecks in Carlisle Bay, and enjoy lunch and drinks on board.

Ride an electric tram deep into Harrison's Cave to see crystal-clear streams, waterfalls and huge stalactites.

A full-day drive from the calm west coast beaches to the wild Atlantic shore at Bathsheba, with stops at the island's best lookouts and landmarks.