A Cathedral in the Wieliczka Salt Mine, near Krakow, Poland
This is a real Cathedral, carved out of the salt by three men and their assistants, working for 60 years. The altar, chandeliers, and even the floor is all made of salt. I wiped my finger across the floor and licked it and sure enough it was very salty. The Cathedral is some 40 metres below the surface in a salt mine just outside of Krakow. The tunnels span over 300 kilometres. It is no longer a functioning salt mine and these days there are health spas, restaurants and even an hotel down here.