Grand Cayman, kissed by sparkling, turquoise waters, is a dream come true for water sports enthusiasts. You can snorkel with stingrays, go scuba diving, sail a catamaran, take in some sport fishing, or just mellow out along the powder-soft sand of the magnificent Seven Mile Beach. While you're there, don't forget to visit Hell, which is devilishly popular with senders of postcards.