The Tellure Mining Park also offers an underground via ferrata installed in the Grande Colonne. The via ferrata is an intermediary activity between hiking and climbing, with cables, ladders, and ramps. There are three routes of increasing difficulty. They are all equipped with a lifeline for semi-autonomous use. Tyrolean traverse (photo), aerial monkey bridge, pendulum, and abseiling are accessible from 8 years old. The equipment (wetsuit, helmet, harness) is provided by the park, but you should bring warm and flexible clothing, as the temperature in the mine does not exceed 32°F (10°C).