If images of island hopping, white-sand beaches shaded by palms, and green mountains brightened by the blossoms of flamboyant trees and hibiscuses come to mind first when you think of the BVI, that’s only part of the story. Much of what makes the islands so appealing unfolds beneath the sea. Perhaps the most famous snorkeling spot is the Baths, on Virgin Gorda, where huge granite boulders are scattered across a bay, creating a fascinating sheltered spot perfect for swimmers of all abilities. The BVI counts more than 100 dive sites and wrecks, perhaps most notably the RMS Rhone, off of Salt Island, which sank in 1867. As you dive 75 feet below the water, you’ll also travel a century and a half back in time. Along the Sir Francis Drake Channel a number of uninhabited islands—Dead Chest, Ginger, and others—have diving and snorkeling spots where you’ll be alone with the colorful, tropical fish, and maybe a few fellow explorers.