The Horses That Never Saw Daylight Again

Wieliczka is so vast the book calls it a city underground, with public roads inside it.

A chapel is hewn from Wieliczka's salt rock, holding a crucifix figure also carved from salt.

Horses lowered into Wieliczka to haul salt remained underground for the whole of their lives.

Boys born in the salt and Cornish mines never recalled walking on the surface of the earth.