The Earth’s Underground Places

Welcome to the underground world! People have always been fascinated by the world beneath our feet. We have dug down into the depths to find sparkling treasures, to bury our dead but also to seek shelter. In this book, you will discover mysterious worlds full of smugglers’ tunnels, escape routes, forgotten mines and magical caves. We shall also investigate lots of deep secrets and visit remarkable places that perhaps were never intended for any living person to ever see. So get ready for a deep expedition and be prepared for surprises! For everyone with an inquiring mind who loves reading non-fiction books!