Treasure Cay, Bahamas
This island in the Abaco chain of the Bahamas has it all: some of the best beaches in the Caribbean, a surfeit of real estate for sale, both in condominiums and lots, easy access both through nearby Marsh Harbour (an international airport) and its own small strip. There’s also a great marina if you want access to the Bahamas’ spectacular waters. (Above: the Bahamas Beach Club)