The Chateau Villemaurine is near the medieval town in St. Emillion. I went to visit their cellars and was surprised that aside from their lovely vineyards, they had quarries of limestone underground which you could explore with a lantern. These quarries existed way back in the 18th century. At the end of the quarry I saw light coming through and took a quick picture before leaving the tunnel. The Chateau Villemaurine also has a monolithic warehouse that houses some of the finest wines in St. Emilion.