Are there secret underground cities?

Turkey's Cappadocia region contains hundreds of underground cities. Derinkuyu happens to be the deepest and most intricate. It is capable of hiding 20,000 people within the tunnels and chambers carved out of volcanic rock. On the outside, the entrance looks almost completely hidden and easily missed.



People Also Ask

The cities of Özkonak, Derinkuyu, and Kaymakli in Cappadocia, Turkey, are some of the most complete (and most underground) of our underground cities. Denrikuyu is estimated to have once been capable of housing 20,000 people, and actually connects to Kaymakli via an underground tunnel, eight kilometers long.

MORE DETAILS

HELSINKI -- Finland may be world's happiest country -- at least on the surface. But Helsinki's underground city tells a different story. Beneath the capital, a massive network of bunkers and tunnels spreads out all across the city.

MORE DETAILS

The ancient city of Elengubu, known today as Derinkuyu, burrows more than 85m below the Earth's surface, encompassing 18 levels of tunnels.

MORE DETAILS

Learn with Us! These unexplained passages number in the thousands, and are located in a mix of European countries. There are around 2,000 known erdstall tunnels throughout Europe, with the highest concentrations in Bavaria (some 700), and Austria (another 500). They have also been found in France and Great Britain.

MORE DETAILS

The Catacombs of Paris is an underground ossuary in Paris that houses the remains of nearly six million people. Back in 1786, the entire underground population of Paris' cemeteries was relocated to quarry tunnels outside the city limits. Visitors can now explore the caverns and tunnels where the bodies were relocated.

MORE DETAILS