The silver mine of Tellure park has existed since 1549. After a first wave of silver digging in the Altenberg mountain, the miners started exploiting the Neuenberg massif following the Saint-Jean vein's discovery. It contained lead loaded with silver that miners learned to extract thanks to innovative techniques from Saxony and Bohemia. Today, the Tellure mining park tells the story of these medieval underground workers. A via ferrata created in 2009 allows exploring the galleries they dug and getting closer to the silver veins emerging from the rocky walls.