If you’re cruising near Nassau in the Bahamas, you may want to head about four miles east to Rose Island, an 11-mile-long thin strip of land with some of the best beaches in the islands. Rose Island once was a pineapple plantation, but that was hundreds of years ago. Now it has no infrastructure or roads, and a shallow lagoon lies in the middle. The highest point of land is just 52 feet above sea level. Rose Island doesn’t have much in the way of civilization. What it does have, in spades, is terrific beaches. Before you get to the…