Three gorgeous, scattered tropical islands Saint Croix, Saint John, and Saint Thomas are the ones you've probably heard of. There's actually around 50 cays and islets that make up the U.S Virgin Islands, each as impeccably pristine as the next. It's easy to island hop throughout the swirling blue hues of the Caribbean sea to get between the islands, and whichever you choose, you'll be met with reggae vibes, rum-filled summer days and beaches as far as the eye can see.