Once only indicated through a sketch by Leonardo da Vinci from around 1495, concealed passageways have been discovered ...

That’s a-maze-ing. A sprawling labyrinth of disused underground spy tunnels central to the James Bond novels could become ...

Clandestine passage under heavily guarded border suggests failures in border security and international cooperation.

Sydneysiders and visitors will get to explore these underground tunnels thanks to a mammoth $1-million restoration project.

Former Fond du Lac Mayor Isaac Brown built the Octagon House in 1856, and it almost didn't survive the 1970s. Here's the history of the house.

London (CNN) — From Narnia to Alice in Wonderland, Britain’s best adventures begin with hidden doors or secret tunnels — and this is a tale with both. Behind an unmarked blue door in London ...