Provence-Alpes-Côte d'Azur · Bouches-du-Rhône, France
Good King René's castle rises sheer from the Rhône, moat-ringed and virtually intact — one of the finest medieval castles in France. Palace and fortress at once: courtly apartments and painted ceilings within, 48-metre walls without, and centuries of prisoners' graffiti carved into its stone, including by English sailors.