In the Guerrero mountains of southern Mexico, cave guide Adrián Beltrán Dimas and Russian speleologist Yekaterina Katiya Pavlova discovered a hidden room in Tlayócoc cave. They found centuries-old ...

Watch as we construct a secret underwater house with a hidden underground passage using only primitive tools and natural ...

A homeowner was floored after detailing how he discovered an Indiana Jones-esque labyrinth of hidden chambers and tunnels underneath his home. “Found a network of tunnels and rooms under my house,” ...

The titles of 12 such books — some of which may have been published before 2025 — are hidden below within an unrelated text ...