Watch as we construct the ultimate secret underwater house with a hidden underground passage! 🏗️🌊 This one-of-a-kind build combines expert craftsmanship with stealthy design, creating a ...

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 ...

One of them is Carn Euny in Cornwall, which dates back 1,500 years and contains a secret 65ft underground tunnel ... prospecting in the area. The passage stretches over 65 feet (20 metres ...

Elon Musk pointed out five years ago through his then Twitter account (now X), stating: "Obviously, the aliens built the ...

The Slave Haven Underground Railroad Museum ... The 19th-century home is filled with secret passages and trap doors that were used by runaway slaves attempting to flee north to freedom.