Crystal Serenity

Arrive at the natural wonder, The Crystal Caves which features stunning azure underground pools and incredible formations of every size and shape imaginable. The lush sub-tropical gardens, unique gift shop and popular café, an adventure for the whole family.

Sail Bermuda's turquoise waters on a catamaran and snorkel over a reef or shipwreck.

Walk on the sea floor wearing a diving helmet, among fish and coral, no swimming or diving experience needed.

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.

A day on the water in Guadeloupe's lagoon: mangroves, coral reef snorkeling and the tiny sandy islet of Ilet Caret.

Visit the real spots from the TV show "Death in Paradise," including the village of Deshaies and Catherine's bar, plus the botanical garden.

A guided visit to a traditional Guadeloupe rum distillery to see how agricultural rum is made, ending with a tasting.

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.

See St. Kitts the way locals do, with a guide who takes you past the usual stops to villages, viewpoints and the stories behind them. One of the island's best-reviewed tours.

Sail the calm Caribbean coast by catamaran, snorkel a reef, and enjoy lunch and drinks on board.

Ride an ATV through old sugar cane fields and hillside trails, with views of the ocean and neighboring Nevis.

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.