Nouvelle-Aquitaine · Haute-Vienne, France
A textbook medieval silhouette doubled in its own moat-lake at Dournazac, in the chestnut country of the Périgord-Limousin park — emphatically not the Loire Valley, whatever the internet keeps repeating. Crusader-era origins, a 12th-century keep, and a 15th-century rebuild after the Hundred Years' War.