The South Fork of Long Island extends only forty miles, stretching east into the Atlantic Ocean from the Shinnecock Canal to the majestic bluffs at Montauk Point. Dotting the coastline are the stylish Hamptons--Southampton, East Hampton, Westhampton Beach, and Bridgehampton--and villages of Sag Harbor, Amagansett, Watermill, and Sagaponack. The landscape in which these towns sit is unique in the United States. It is not one landscape but a collection...