A Soviet megastructure, a massive Nazi brainwashing complex and a dangerous desert pass are revisited to reveal how they were built and why they are now deserted.

A ghost town that was once a dangerous, industrial hellscape, a giant warship at the bottom of the ocean and a top secret relic that could have changed the Cold War are explored.

The events that took place in a large town just outside Chernobyl on the eve of the disaster, a fleet of ghost ships and a dangerous mountain road that changed history are explored.

The stories behind a massive military site that was once a hotbed for nuclear testing, a top secret airbase hidden inside a mountain and an otherworldly power plant are explored.

The history behind a classified Soviet machine built to prevent an all-out nuclear war, a top secret Nazi facility and a strange tower that left an enduring legacy is explored.

A cutting-edge research complex built by a visionary genius, an ambitious Nazi project that met a sinister end and a Cold War relic that changed history are explored.