Secrets Underground: North America's Buried Past
MacLeod, Elizabeth / Macdonald, David
Uncover the spine-tingling mysteries and eerie surprises that lurk right under your feet! In Secrets Underground, history buff Elizabeth MacLeod takes readers deep down, below the earth's surface, and introduces them to a completely different world-sometimes terrifying, often baffling, and always fascinating. Discover: . the Civil War secrets carefully concealed in Organ Cave, West Virginia . the top-secret equipment that lies deep below Grand...