Beneath the town of Wieliczka in southern Poland lies one of the world's most extraordinary underground landmarks. The Wieliczka Salt Mine, which has operated for more than 700 years, is a vast maze of tunnels, chambers, underground lakes and remarkable works of art carved from rock salt. Together with the nearby Bochnia Royal Salt Mine and the Wieliczka Saltworks Castle, it forms a UNESCO World Heritage Site that documents the evolution of European mining techniques from the 13th to the 20th century. Far more than a former mine, Wieliczka is an underground world where history, engineering, religion and art come together beneath the Earth's surface.
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