Beneath cities and landscapes around the world, there are places most people were never meant to see. Old tunnels, shelters, ...

First created during the Cold War, Project Iceworm saw the US plan to store hundreds of ballistic missiles in a system of ...

If full-blown world conflict breaks out, there are a number of places across the globe which would probably be safe.

Forty feet underground, the city's once-bustling system of freight tunnels remains. Social media videos show adventurers and ...

600 feet below the Hudson Valley, the longest tunnel in the world is helping deliver drinking water to New York City. The 105 ...

Those Italian tunnels — and two weeks traveling — made me think about the tunnel’s meaning — not just on the road but in our ...

The city of London will by 2028 have the world’s second deepest pub. Pub 320 is today the deepest at 320 metres below street ...

Tour the tunnel under a hospital in which Mohammed Sinwar, a top Hamas militant commander, was killed after a barrage of Israeli strikes.