The World's Top Beaches for Perfect Sand — huffingtonpost.com

Hawaii's not the only island with beautiful black sand beaches: a small stretch of Puerto Rico's Vieques coast is similarly blessed with inky, jet-black sand. The color of the sand at Playa Negrita can be attributed to fine but heavy volcanic material, containing tiny fragments of lava, that's transported from volcanic areas like Monte Pirata through quebrada and onto the beach itself. Playa Flamenco, or Flamenco Beach, is known widely as one of the world's most beautiful beaches, and for good reason. It stretches for a mile around a sheltered, horseshoe-shaped bay, and boasts the softest, whitest sand of all the beaches in Puerto Rico. But be warned: You'll need to come early to find a spot on it.

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