What do Royal Caribbean, Disney, Norwegian Cruise Line (NCL), Holland America, and Princess all have in common, besides cruise ships? They all have their very own private islands. ​ Private islands have become fashionable in cruising, with all of the aforementioned cruise lines offering these resort-style destinations to their guests. However, if private islands are a trend, then Norwegian is the trendsetter, having called Great Stirrup Cay in The Bahamas its own since 1977, becoming the first cruise line to turn an uninhabited island into a private port. I recently spent a day there — keep scrolling to see what it was like.