"A deep dive into the mysteries of the underworld. Secret crypts, underground rivers, and engineering marvels are revealed in exquisite detail, exposing the background stories of the world's greatest hidden wonders." Jill Heinerth, author of Into the Planet Filled with fun facts and unbelievable photography, Subterranea is a below-the-surface exploration of the world’s most spectacular underground spaces. Geographer and storyteller Chris Fitch peels back the outer layer of th