>The salt mine at Wieliczka, near Krakow in southern Poland, is a World Heritage Site. It was one of the world’s oldest operating salt mines today open for tourists. Until 2007, this mine has been worked continuously since medieval times, since the 13th century.
>The salt mine at Wieliczka, near Krakow in southern Poland, is a World Heritage Site. It was one of the world’s oldest operating salt mines today open for tourists. Until 2007, this mine has been worked continuously since medieval times, since the 13th century.