Black rock outcropping along the road to Rennes-les-Bains coming from Coustaussa. The ancient silver and copper mines in this mountain top, opposite Blanchefort is dubbed ‘le Roc Noir’ (Black Rock). The location allegedly held the treasure chambers of the Visigoth Kings. Pierre Plantard claimed the secrets of the Priory of Sion were hidden here in a Celtic Sanctuary called The Round Temple of the Rocher Noir (Black Rock). Plantard bought 8 plots of land here in the 50s and 60s that were passed on to his son Thomas after his death.