The Tellure Mining Park is located on a former silver mine. Today, several speleological routes and a via ferrata allow you to follow in the footsteps of the miners who, by their own hands, dug this enormous 120-metre-high cavity known as Colonne Saint-Jean (St. John’s Column). The Saint-Jean (St. John) vein was originally discovered in 1549. Mining flourished until 1570, after which it went into a long decline. The Thirty Years’ War (1618-1648), combined with famine and plague, forced the miners to leave. In 1636, mining activity stopped. Reopened in the 18th century for a few decades, the Saint-Jean mine was renamed Engelsbourg (castle of the angels).