Where Is the Worlds Largest Underground City

Where Is the World’s Largest Underground City?

Deep beneath the surface of our planet, hidden from the bustling world above, lies the mysterious world of underground cities. These subterranean structures have fascinated explorers, archaeologists, and curious minds for centuries. Among these hidden gems, one city stands out as the largest and most awe-inspiring of them all – Derinkuyu in Cappadocia, Turkey.

Derinkuyu, meaning “deep well” in Turkish, is an ancient underground city that dates back to the 8th century BC. Carved out of soft volcanic rock known as tuff, this labyrinthine city extends a staggering 85 meters below the ground, with multiple levels and a network of interconnected tunnels.

Spanning an estimated area of 20,000 square meters, Derinkuyu was designed to accommodate thousands of people, providing shelter, storage, and even places of worship. It is believed to have been used by early Christians to escape persecution during the Byzantine era. The city was constructed with remarkable engineering precision, featuring ventilation shafts, wells, stables, and even a school.

Derinkuyu’s underground city is truly a marvel of human ingenuity. The complex architecture includes narrow passages, low-ceilinged rooms, and various chambers that served different functions. Some rooms were used for living quarters, while others were designed for communal gatherings and religious ceremonies. The city even had a winery and a vast food storage area, capable of sustaining the population for extended periods.

Ventilation was a crucial aspect of Derinkuyu’s design. The city’s architects ingeniously implemented a sophisticated ventilation system that allowed fresh air to flow through the tunnels, providing inhabitants with a constant supply of oxygen. This system prevented the buildup of stale air and ensured a livable environment deep underground.

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Derinkuyu remained undiscovered for centuries until it was accidentally revealed in 1963 when a resident of the area stumbled upon a hidden room behind a wall in his home. Excavations began, unveiling the vast underground city that had been lost to history.

Nowadays, Derinkuyu is open to the public, allowing visitors to explore this ancient marvel and witness the remarkable engineering skills of the past. It serves as a testament to the resilience and adaptability of the human spirit, as well as a reminder of the challenges faced by our ancestors.


1. How deep is Derinkuyu underground city?
Derinkuyu extends 85 meters below the surface.

2. When was Derinkuyu built?
Derinkuyu dates back to the 8th century BC.

3. How large is Derinkuyu underground city?
Derinkuyu spans an estimated area of 20,000 square meters.

4. Who built Derinkuyu?
The exact builders of Derinkuyu are unknown, but it is believed to have been constructed by early Christians.

5. What was the purpose of Derinkuyu?
Derinkuyu served as a refuge for early Christians escaping persecution during the Byzantine era.

6. What is Derinkuyu made of?
Derinkuyu is carved out of soft volcanic rock called tuff.

7. How many levels does Derinkuyu have?
Derinkuyu has multiple levels, although the exact number is uncertain.

8. Are there ventilation systems in Derinkuyu?
Yes, Derinkuyu features a sophisticated ventilation system that provided fresh air to its inhabitants.

9. Can visitors explore Derinkuyu?
Yes, Derinkuyu is open to the public for exploration.

10. How was Derinkuyu discovered?
Derinkuyu was accidentally discovered in 1963 by a resident who found a hidden room in his home.

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11. Can you still see the original structures in Derinkuyu?
Yes, many of the original structures and architecture of Derinkuyu are still intact.

12. What other underground cities exist in the world?
Other notable underground cities include Kaymaklı and Özkonak in Cappadocia, Turkey, as well as the underground city of Montreal in Canada.