Beneath the surface of America lies a hidden world—literally. In this video, we explore 10 secret underground places in the U.S. that most people have never heard of. From Cold War doomsday ...

America’s ICBM infrastructure is vast, with 400 missiles deployed in 450 silos across the great plains. A spider’s web of ...

Most Popular: Cold War-Era Missile Silo With Underground Bunker Hits Market for $1.45 Million—and Blasts to the Top of Most Popular Homes List Doomsday preppers and war historians alike are sure ...

During the Cold War, the U.S. built a military base under the ice in Greenland, hidden from the Soviets. It was eventually abandoned, but its most lasting legacy is a pivotal role in climate science.

Hidden beneath the old bunkers at Fort Stevens State Park on the Oregon Coast is a network of long-abandoned tunnels built to defend the U.S. from its enemies.