The Tellure mining park in Sainte-Marie-aux-Mines offers to explore a via ferrata in underground galleries used from the 16th century to 1907. In the Middle Ages, the veins were often exploited using simple techniques and equipment such as chisels and winches. Buckets transported the drained water excess to the surface. In the 16th century, the work was organized, with horizontal galleries drilled further down that evacuated the water in depth. A mining code from Saxony was also established. The working conditions remained grueling, but miners benefited from an assistance fund and tax exemptions.