This vibrant destination in the U.S. Virgin Islands is a Caribbean paradise and the perfect tropical getaway. Colonized in the 18th century by the Danish, who established massive sugarcane plantations there, St. Thomas was later purchased by the United States in the 20th century. A popular stop on Caribbean Cruises, the island boasts a number of exciting excursions sure to impress the adventurous traveler. Hop aboard a sky gondola to find breathtaking aerial views of the island, glide through lush rainforests on a zipline, or snorkel alongside sea turtles in the crystal clear waters. Explore downtown Charlotte Amalie, the island's biggest city, to immerse yourself in St. Thomas's colonial past at Fort Christian or Blackbeard's Castle.