Caves, Mines and Tunnels (World Of...) - Tapa dura

Have you ever thought about what might be happening beneath your feet?Do you stop to think that there may be a whole amazing world of activity going on down there?This book gives you the opportunity to find out just how many different ways people have used the earth, from prehistory to the present day. Discover how and why they have explored it, mined it, lived in it, fought from it and traveled through it. Look beneath the cover to find out how medieval soldiers ‘undermined’ their enemies and to explore what lies beneath New York City’s 500,000 manhole covers.