Length: 16,4 km
Difference in altitude: uphill 447 m – downhill 1036 m
Duration: 5 hrs, 30 min.
The mining activities that have taken place along this itinerary in the past 2000 years have left important traces, in particular, the infrastructures for the mobility of the miners and transportation of the minerals, surrounded by beautiful nature. On this stage you walk 800m underground while passing through, from north to south, what was once the second European carsic cave opened to cars and trucks. Nowadays it has been closed to traffic and can be crossed only by foot, horse or bike.