History Bochnia Salt Mine
entrance sutoris headframe the mine shafts measure 4.5 kilometres (2.8 mi) in length @ 330–468 metres in depth below surface, @ 16 levels. in 2013 mine added unesco world heritage list extension of wieliczka salt mine inscription of 1978. august passage the august passage main communication , transportation route in mine. runs east west of mine, connecting in straight line bottom ends of campi , sutoris shafts. @ depth of 176m top of sutoris shaft , 212m counting top of campi shaft. august passage called long stove (piec długi). first part, extending between rabsztyn chute , campi shaft, built in years 1723-1743, in accordance design jan gottfried borlach. great achievements regulate routes in mine ensuring straightening , leveling. result of this, on next decades, august passage able reach length of 3 km (2 mi). excavated chambers, shafts , passages form underground town, open sightseers. largest of preserved chambers has been converted sanatorium. ważyn chamber the waży...