St. Thomas/St. John, part of the U.S. Virgin Islands gets high ratings for its gorgeous scenery ranging from mountains, to countryside, and pristine beaches and ocean. Activities to think about including are: exploring the Cas Cay Wildlife sanctuary where you can snorkel, kayak, and walk the beaches. Or take an excursion to the mangrove mazes on the south coast and visit a scenic natural reserve. Also visit Coral World Ocean Park to look at sea anemones, starfish, sea cucumbers and more.