Wieliczka Salt Mine, Southern Poland
Krakow, Southern Poland, Poland
Wieliczka Salt Mine, first excavated in the 13th Century by miners and produced Salt until 2007. Everything in the mine is made from Salt, including the Staircases, Statues, Floor Tiles, Chapels, Carvings, and staircase railings. The Mine has a depth of 327 meters and extends via horizontal passages and chambers for over 287 kilometers (178 miles).