The world is full of beautiful beaches, and you can make an argument for any number of sultry destinations as being the best. But there’s probably no place on earth that can boast the sheer variety and vivid, almost otherworldly wonder of the beaches in the Bahamas. Here, the water is just bluer, the sand whiter, the greenery a little more verdant. The beers at the beach bar are somehow a bit colder. With 700 islands—only 30 of them inhabited—plus 2,400 smaller cays, the Bahamas are a tropical marvel. The names—Bimini, Abaco, Ragged Island—ring out like a Jimmy Buffett song, spreading out just west of Florida and stretching almost all the way down to Hispaniola. Come here and you’ll be spoiled for choice. Here’s a guide to some of the finest locales that will provide an unforgettable swim. Big Major Cay (Pig Beach) These pigs are famous—they’ve been featured prominently …