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

And so it is: Avinatan is a beacon of light in a tunnel deep beneath the ground. If you close your eyes, you can feel his light glowing in that dark, unforgiving place. I picture him there ...

A MYSTERIOUS hole on Mars could be harbouring alien life in an extensive network of underground tunnels, according to Nasa. From orbit, scientists have captured a deep pit on the Red Planet that ...

Advocates go underground to help homeless in Las Vegas ... He said he fears that soon he’ll see more faces in the dark tunnels, where community rules are written in graffiti and ankle-deep ...