When I visit Lexington, Kentucky, in the heart of the part of the state that would have sided with the Confederacy if President Lincoln hadn’t prevented it, I remember Stephen Foster’s “Old Sweet Song.” Is there anywhere else in the world that has such lush enormous maples, magnificent Tulip Poplars, hedges of spun sugar white flowers I can’t identify? Or such blocks of handsome turn of the century houses, as in Fayette Park, each with its distinctive Richardsonian bay window or Victorian white trim, each set at a comfortable distance from its neighbors in a broad pad of Bluegrass lawn and flower borders?