Wieliczka Salt Mine

This guide to the Wieliczka Salt Mine near Kraków opens with the legend of a Hungarian princess named Kinga, said to have dropped her engagement ring down a Hungarian mine shaft before her wedding, only for miners here to pull one up inside a fresh block of salt. It follows the mine's own history from there, more than three hundred kilometers of tunnels dug over centuries by miners working entirely by candlelight far below ground. Stand in the chapel carved from salt, more than a hundred meters underground, and look closely at the reliefs on the walls around you.