Sanibel Island has been named the best place in the U.S. for shelling (collecting seashells). In fact, it's known as the "Seashell Capital of the World." Here, mellow surf washes up thousands of picture-perfect seashells each day. Collect the Lightning Whelk, Lace Murex, or Alphabet Cone — all make great souvenirs. Explore more shells and aquariums at the Bailey-Matthews National Shell Museum.