The small island Utö in the archipelago of Stockholm is famous for its iron ore. The ore was mined as early as the 12th century, and so this is the oldest iron mine of Sweden. Today there are traces of the mining era in the deep waterfilled mine holes, the big piles of mine tailings and Lurgatan with its old houses, 18th century, where the miners lived. In the small mining museum, open every day in summer, you can learn about the history of the mines and look at interesting collections from that time.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.