Deep beneath the plains of central Turkey lies one of the most astonishing engineering achievements of the ancient world: Derinkuyu Underground City. Carved into soft volcanic rock, this extraordinary subterranean complex extends through multiple levels below the surface, creating what is believed to be the largest excavated underground city ever discovered.
A city beneath a city
Descending dozens of meters underground, Derinkuyu consists of an intricate network of tunnels, chambers, and pᴀssageways designed to support long-term habitation.
Archaeologists have identified living quarters, kitchens, storage rooms, wine and oil presses, wells, communal areas, and religious spaces throughout the complex.

Separate sections were even used as stables for animals, allowing residents to bring livestock underground during times of danger.
One of the city’s most impressive features is its sophisticated ventilation system. Mᴀssive vertical shafts supplied fresh air to the lower levels, making extended occupation possible for thousands of people.
Huge circular stone doors could be rolled into place to seal pᴀssageways, helping protect inhabitants from invaders.
A refuge during uncertain times
Historians believe Derinkuyu served primarily as a defensive refuge. During periods of invasion, warfare, or political instability, entire communities could retreat underground and survive for extended periods.
Estimates suggest the city may have accommodated tens of thousands of people along with their food supplies, livestock, and essential resources.
Who built it?
The exact origins of Derinkuyu remain a subject of research and debate.
Many scholars believe the earliest sections may have been excavated by ancient peoples of Anatolia, with later civilizations—including the Phrygians, Romans, Byzantines, and other regional cultures—expanding and modifying the city over many centuries.
Rather than being the work of a single civilization, Derinkuyu appears to represent generations of adaptation and construction, reflecting the changing needs of the communities that used it.
An ancient masterpiece of survival
Far from being a mythical lost city, Derinkuyu is a remarkable example of human ingenuity. Its elaborate design demonstrates how ancient societies developed creative solutions to security threats, environmental challenges, and the need for long-term survival.
Today, Derinkuyu stands as one of the world’s most extraordinary archaeological sites—a hidden underground metropolis that reveals just how sophisticated and resourceful ancient civilizations could be.