Wieliczka salt mine tourr r journey 135m 440ft below ground to explore one of the oldest salt mines in europe on this fascinating wieliczka salt mine tourr r this salt mine is the worldandrsquos only mining site that has been functioning continuously since the middle ages and is a key part of polandandrsquos history with a place on the unesco world cultural heritage listr r accompanied by an expert english speaking guide youandrsquoll journey through 3 levels of monumental chambers jo