Beneath the streets of Berlin, another world is waiting to be discovered. The Unterwelten Museum is dedicated to the ...

This video shows how we built a complete underground house and installed a custom waterproof door using only primitive tools.

A massive, secretive military project is underway near Beijing, and satellite images are showing just how big it is. The ...

As geopolitical tensions escalate across many parts of the world, new satellite images have revealed the scale of a colossal ...

AN UNDERGROUND SCHOOL shelter in Ukraine has been officially opened with the help of funding from the Irish Government.