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

Researchers explore the possibility of a secret passage that may have been used in ancient times for strategic, diplomatic, or commercial purposes.

searching for tunnels that ran through it like hidden passages in the ceiling of a mansion. Local porters ferry the expedition team’s equipment across an underground river to reach various ...

At the start of October Nicolas Favresse and Sean Villanueva added a new free route, "The Secret Passage" 5.13c to El Capitan ... just finding the way up from the ground and bringing the mandolin and ...