Atlantic Beach, Florida
This $1.85 million duplex, circa 1975, was built into a dune created by 1964's Hurricane Dora. Seeking sites to build rental properties, Harvard-trained architect William Morgan decided to build inside of the dune instead of on top of it. Now Morgan is looking to sell the property
—consisting of twin 750-square-foot units and built-in furnishings—to a buyer that will value its green features, including energy-saving natural climate control. This winter when the outside temperature was freezing, the interior of the Dune House was a pleasant 72 degrees.