The Gold Coast of Long Island is known for its grand estates, built for the likes of the Vanderbilts, Hearsts, Guggenheims, Roosevelts and J.P. Morgan (and the fictional Great Gatsby). More than 500 of these monuments to sudden wealth went up in the late 19th century, but only some 200 remain. One of them has a history longer than most of the others. At Lloyd Harbor, the property around the 10-acre Fort Hill House, once the site of Fort Franklin, was an important location during the American… (View original article)