The Underground City
Someone Carved a City 85 Metres Underground for 20,000 People. But Who?
In 1963, a man in central Turkey knocked down his basement wall during a renovation. Behind it, he found a steep tunnel carved from solid rock — leading down into darkness. That tunnel opened into an underground city at least eight levels deep, with rolling stone doors, ventilation shafts, churches, schools, and stables.
It could hold twenty thousand people. It had been hidden beneath a quiet Turkish town for decades. And nobody could agree on who built it — or exactly when.
The Hittites left artefacts in the upper levels. The Phrygians had the skills to carve it. The Christians expanded it. The Byzantines perfected it. But the full truth may never be known — because ninety per cent of the city remains unexplored.
Derinkuyu
An underground city in Cappadocia, Turkey, carved from volcanic tuff rock over thousands of years by multiple civilisations. Rediscovered in 1963 when a man broke through his basement wall and found a tunnel that led 85 metres underground.
85 metres
Eighteen storeys deep — taller than most buildings, but going down.
20,000 people
With livestock, food stores, wine presses, and water wells.
600+
Concealed behind bushes, in courtyards, and inside people's homes.
The Evidence
The Rolling Stone Doors
Circular discs of rock weighing up to 500 kilograms — openable only from the inside. Each floor could be sealed independently. Small holes allowed defenders to thrust spears at attackers while keeping the door shut.
The Construction Layers
Upper levels show rough Bronze Age carving. Deeper levels show precise Iron Age techniques. Christian sections contain crosses and Greek inscriptions. Each layer tells a different story about a different civilisation.
The Underground Network
Over 50 main ventilation shafts, 15,000 smaller air channels, a well reaching 55 metres deep, and a tunnel connecting to Kaymakli — another underground city kilometres away. This was not a hiding place. It was a civilisation.
Three Thousand Years Underground
The Hittites Arrive
The Hittites settle in Cappadocia and discover that the volcanic tuff rock can be carved with simple tools. They dig the first storage tunnels and shelters.
The Phrygians Build
After the Hittite Empire collapses, the Phrygians — master Iron Age rock-carvers — begin the first major underground construction at Derinkuyu.
Xenophon's Account
The Greek soldier Xenophon writes the oldest known description of underground dwellings in Cappadocia: "spacious below" with tunnels for animals and ladders for people.
Christians Expand
Early Christians fleeing Roman persecution arrive in Cappadocia and significantly expand the underground complex, adding chapels with crosses and Greek inscriptions.
The Byzantine Fortress
During centuries of Arab-Byzantine wars, the city is deepened to its full extent. Churches, a missionary school, and the tunnel to Kaymakli are added.
The Population Exchange
Christian communities are expelled from Turkey. The people who knew the underground cities leave — and within a generation, the entrances are forgotten.
The Rediscovery
A man knocks down his basement wall and finds a tunnel leading to a vast underground city at least eight levels deep. Derinkuyu is rediscovered.
The People in This Story
Xenophon of Athens
A Greek soldier who described underground dwellings in Cappadocia around 370 BCE — over two thousand years before Derinkuyu was officially rediscovered.
Andrea De Giorgi
Associate Professor at Florida State University. A leading expert on Derinkuyu's construction, who credits the Phrygians as the primary builders of the deeper levels.
Richard Dawkins
A Cambridge linguist who documented people sheltering in the underground cities as recently as 1909 — among the last recorded uses before the population exchange.
The Question That Remains
The Hittites started digging. The Phrygians built deeper. The Christians expanded. The Byzantines perfected. And the people who could have told us the full truth were forced to leave in 1923.
Who truly built Derinkuyu — and when a mystery has been carved into by so many hands over so many centuries, is it even possible to give a single answer?
Read the full book to investigate every piece of evidence — then decide for yourself.
Get the Full Book
The complete Derinkuyu mystery. 9 chapters of evidence, theories, and a question only you can answer.
Part of the Ancient Mysteries Volume
Giant drawings visible only from the sky. Books written in languages nobody can read. Machines that shouldn't exist. Real artefacts — no explanations.
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