Victoria Vale said the mysterious door "seemed like it hadn't been opened in a very long time," and she was determined to ...

Nick's Signal Spot explores the untold story of tunnel radio systems that bring AM and FM signals to life below the surface.

The Underpass in the underground tunnels of Blue Prince holds a lot of secrets, and several are hidden behind a sealed Red Door.

Contractors renovating a historic home in Belgium stumbled upon the entrance to a secret tunnel identified by archaeologists as an escape route from World War I. Photos show the long-forgotten yet ...

“Plus, it’s just boring,” he wrote. “I’d rather find a more elegant way in than simply breaking down a door.” Although Max said he knows the danger of exploring underground tunnels, he said skill, ...