- dug between 1891 and 1963;
- more than 80 m below ground;
- large tunnels on two different levels;
- impressive cavities left over by the miners;
- machines and tools from the 1860 to 1997.
From Thursday to Sunday – Departures 14:30, 15:30 and 16:30;
Rates: adults 9€, students 7€ and children 5€