While exploring a massive 3-mile cave system, we stumbled upon something completely unexpected - a hidden passage lined with ...

The USSR-built Plokštinė Missile Base once housed nuclear missiles aimed at Western Europe. Abandoned in the late 1970s, it’s ...

Many people in London hit all the tourist spots, Leicester Square, Covent Garden and Oxford Street but one hidden gem should ...

From Boston to Denver, these cities have underground tunnels that you can explore, including this city in New Jersey.

Around 1,000 years ago, a village that can only be accessed through a hidden passage was left abandoned, and the mystery ...

The city of Houchengzui in northern China is an archaeological site dating back more than 4,000 years. Back then, it was a heavily armoured place with three concentric defensive walls, turrets, ...

A top travel destination has uncovered an ancient secret. A little-known network of subterranean passageways hidden beneath Rome’s Capitoline Hill — holding clues to a long-ago chapter of the Eternal ...

A STUNNING piece of Rome’s past has been uncovered after being sealed off more than a century ago. This network of dimly lit ...

Feeling a little hot during the dog days of summer? Cool off at one of Wisconsin’s boundless indoor escapes. Here’s to making ...

Transit riders are always looking for a way to get around faster and more efficiently. Underground passageways and ...

Known as Emsworth, the historic Georgian villa near Dublin features a secret tunnel, a padel court, and a guesthouse.

WASHINGTON — President Donald Trump makes no secret of his displeasure over the cost of renovating the Federal Reserve ...