Beaujolais wine area of "Les Pierres Dorées" (the Golden Stones). When someone is trotted in the south of the famous vineyard, very near to Villefranche-sur-Saone, not the vines will surprise him but the mineral matter. Everywhere presents, used in the construction of the houses and the castles, but also of the churches, the laundrettes, the wells and the low walls, it dominates the landscape...