A well-traveled cynic might call the Chateau de Marqueyssac a “manufactured” tourist experience.  For Karen and me, though, these extraordinary gardens in the Périgord Noir (Dordogne) are among the best-managed, most family-oriented places we’ve found anywhere in the deep heart of France.  And they are the perfect setting for a long walk on a spring afternoon. The same family has owned this property since 1692, and they take pride in saying that Marqueyssac has been “laid out for the pleasure of taking a walk.”  We’re 130 meters (427 feet) above the Dordogne, looking out across the great river’s valley.  From here you can see at least four of France’s official “most beautiful villages” —