Silver metal is used for minting coins during the Middle Ages and is, therefore, essential for the development of France from the 10th to the 14th century. The locality of Sainte-Marie-aux-Mines extends in a particular geological area, constituted of numerous faults and fractures into which surface water infiltrates. It digs into the gneiss walls, which are then filled with minerals and form deposits. The via ferrata of Tellure Park allows close observing of the outcrops of silver, copper, lead, and quartz.