Under the small town of Wieliczka, part of the Krakow metropolitan area, lies 287 kilometers of underground passages. It's the Wieliczka salt mine[a], a salt mine that was in continuous operation from the 13th century until 2007.
2020-10-16 14:22
2020-10-16 14:25
2020-10-16 14:35
2020-10-16 14:55
2020-10-16 15:00
2020-10-16 15:22
2020-10-16 15:26
2020-10-16 15:32
2020-10-16 16:31
2020-10-16 16:33