Carnival Cruise Line's private, 2,400-acre Bahamas island — also visited by Holland America Line ships — has a 2-mile, crescent-shaped beach where you can frolic in soft sands, dip your feet in clear blue sea, enjoy a cold rum drink in a hammock under a swaying palm tree, or indulge in an open-air massage. You'll also find lots of natural attractions on this mostly undeveloped swath.