It is the largest excavated underground city in the world and stretches more than 85 metres below the surface.

A team of researchers has made an extraordinary claim – the existence of a vast underground city beneath Egypt’s iconic Giza ...

After the Great Flood of 1862, Sacramento elevated its streets and buildings creating a unique underground world still ...

Iran's military chief claims capabilities are now 10 times stronger than thoseused in October missile attack on Israel; several Iranian-made missiles identified in footage ...

Scientists have discovered a "vast underground city" running beneath the famed Egyptian pyramids in Giza. Using radar equipment, they created high-resolution photos of thousands of feet below the surf ...

In the 1930s, three gold-seekers dug beneath Los Angeles, searching for tunnels supposedly built by an advanced civilization of lizard people.

"When we enlarge the images (in the future), we will reveal that underneath lies what can only be described as a true underground city," said Corrado Malanga of the University of Pisa in a statement.