La Platte Mare is a simple megalithic chamber with a single capstone dating back to the Chalcolithic or Early Bronze Age (2500 - 1800 BC). Early drawings show that some stones have been disturbed. Traces of a surrounding circle of stones 5m in diameter are no longer visible. One stone has a curved row of 12 cup marks though only 7 are visible above ground. A few metres away are the remains of another possible cist or chamber.
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.