Playground at the bottom of Rudolf Salt Mine in Turda, Romania, includes a Ferris Wheel, bowling lanes, and pool tables

Wooden walkway cut into salt walls provides an overview of the Salina Turda Salt Mine in Turda, Romania, where patients come for respiratory treatment

Franz Josef Gallery at the Salina Turda Mine in Turda, Romania, was built to more easily convey salt blocks to the surface

This extraction machine at Salina Turda Salt Mine in Turda, Romania, used horse power to vertically raise blocks of salt to the surface

Long shaft and stairway leads down into the bowels of the Salina Turda Mine in Turda, Romania, a once valuable salt mine