Visiting Derinkuyu: The World's Largest Underground City
Published: July 16, 2026.
An entire city carved into volcanic rock beneath central Turkey was built for one purpose: to let thousands of people vanish, on short notice, for weeks at a time. Derinkuyu, in Turkey’s Cappadocia region, descends at least eighteen levels and roughly 85 metres into the ground. Historians estimate it could shelter as many as 20,000 people, along with their livestock, grain stores and wine presses, sealed behind rolling stone doors that could only be opened from inside. It is not a ruin of a city that once stood on the surface and later fell. It was built underground from the start, and its entire design answers a single question: how do you make an entire community disappear.
What is Derinkuyu
Derinkuyu sits beneath a quiet farming town of the same name, about 30 kilometres south of the tourist hub of Göreme, in the province of Nevşehir. The name means “deep well” in Turkish, a reference to the shafts that once supplied both the underground settlement and the town above it with water. For centuries, locals knew the caves existed. What they did not know, until an accident in 1963, was how far they went.
Cappadocia’s landscape made this kind of construction possible in the first place. Volcanic eruptions from Mount Erciyes and its neighbours, millions of years ago, blanketed the region in ash that compressed into tuff, a rock soft enough to carve with hand tools but stable enough to hold its shape without reinforcement. The Greek word for soft, malakos, may be the root of Malakopia, the name Cappadocian Greek speakers once used for the settlement. The same geology produced the fairy chimney rock formations that draw most visitors to the region above ground. Underground, it produced something stranger: room after room, corridor after corridor, cut directly into stone that gave way easily enough to shape and held firm enough to trust.
The earliest excavation at Derinkuyu is generally credited to the Phrygians, who worked the site in the eighth and seventh centuries BC. What they left behind was almost certainly simpler than what exists today, closer to storage caves than a functioning settlement. The transformation into something resembling a city took place gradually, under Byzantine rule, as Cappadocia’s Christian population expanded the original caverns into a multi-level complex with chapels, a school, and defensive architecture built specifically to withstand and outlast an attack from above.
Built for Disappearance, Not for Living
It is tempting to describe Derinkuyu as an ancient city in the ordinary sense, and the comparison is not wrong so far as it goes. Wine presses, stables, kitchens with soot-blackened ceilings, storage rooms lined with clay jars, a barrel-vaulted hall on the second level that may have served as a religious school: all of it points to a place equipped for real, extended habitation. But the more revealing detail is what the city was built to do when danger arrived, because that is what shaped nearly every design decision inside it.
Between roughly 780 and 1180, during the long stretch of Arab-Byzantine conflict, Cappadocia’s Christian communities faced repeated raids from Umayyad and later Abbasid forces. Derinkuyu’s population is thought to have come closest to its full capacity during this period, as families retreated underground for the duration of a raid and then returned to the surface once it passed. This is the pattern worth holding onto: not a single migration underground, but a repeated, practiced withdrawal, rehearsed by successive generations until the architecture itself became a kind of muscle memory for survival.
Everything about the interior reflects that logic. The circular stone doors, some weighing several hundred kilograms, were carved to roll across a passage and lock in place from the inside only, so that anyone attempting to force entry from above or outside would find the door immovable. Each floor could be sealed independently of the others, meaning that even if intruders breached one level, the rest of the city could remain closed off and, if the evidence for coordinated counterattacks is accurate, capable of organising a response from below. The tunnels connecting levels were deliberately narrow, in places under a metre and a half high, forcing anyone moving through them, friend or enemy, to travel bent over and single file. A structure built purely for comfortable daily living would not have chosen those dimensions. A structure built to control who moved through it, and how quickly, would.
Ventilation posed the hardest engineering problem, since keeping thousands of people breathable air 85 metres underground has no easy solution with hand tools. Derinkuyu’s builders answered it with more than fifty vertical shafts, ranging from small vents linking individual rooms to a central shaft reported at around 55 metres deep, cut straight down to the surface. Several of these shafts doubled as wells, drawing water up from underground aquifers as well as circulating air. The result, by most accounts, kept temperatures inside a steady 13 to 15 degrees Celsius year round, regardless of the season above, and allowed residents to remain underground for extended stretches without the air turning stale or the water running out. Visitors today still feel a faint draft moving through certain corridors, evidence of a system still doing, imperfectly, what it was built to do more than a thousand years ago.
A Chicken, a Wall, and a City
Derinkuyu’s modern history began with an accident rather than an excavation. In 1963, a resident of the town above, carrying out routine renovations to his house, knocked through a wall in his basement and found a passage leading further into the rock than any known cellar should. Chickens kept for the household had reportedly been disappearing through a gap in that same wall, which is how the discovery began at all. What followed was not a small find. Archaeologists who investigated the passage traced it downward through level after level of carved rooms and staircases, eventually mapping a complex far larger than anyone had suspected lay beneath the town’s foundations.
The underground city had not been entirely forgotten before 1963. Cappadocian Greek communities are known to have used sections of it as late as the early twentieth century, including as shelter during periods of regional conflict, before the population exchange between Greece and Turkey in 1923 removed the Christian community that had maintained knowledge of the tunnels across generations. Once that community left, the entrances fell out of use, and the passages that connected daily life above ground to the world below were simply lost, buried under rockfall and reused foundations, until an ordinary act of home repair reopened them.
Roughly half of the known complex was made accessible to visitors by 1969, and that proportion has changed only modestly since. Of the eighteen levels archaeologists believe exist, around eight are currently open to the public, reaching a depth of about 85 metres. The rest remain closed, whether for structural stability, ongoing study, or simply because there has been no pressing need to open further ground that already tells the story clearly enough.
Descending Through the Levels
Walking into Derinkuyu today means moving through a sequence of spaces that shift character the deeper you go. The uppermost levels, closest to the surface, held stables, a practical decision that put the smell and heat of livestock nearest the strongest ventilation and furthest from where people slept. Descending further brings you into kitchens with ceilings still darkened by centuries of cooking smoke, storage rooms where large jars once held wine and oil, and living quarters cut into the rock in small, connected clusters rather than open halls. Staircases beginning around the third and fourth levels lead further down toward a cruciform church on one of the lowest accessible floors, its shape carved directly into the stone rather than built up from it.
The passageways between these spaces are where the city’s defensive logic becomes physical rather than historical. Some sections require visitors to crouch and move single file for ten or twenty metres at a stretch before opening back out into a chamber tall enough to stand upright in. The one-way route is well marked and lit, but the tightness is real, and it is the same tightness that once slowed an armed intruder to a crawl. Modern visitors experience, briefly and voluntarily, a version of the same physical constraint that Byzantine defenders relied on for their survival.
At Derinkuyu’s edge, quite literally, is a detail that keeps its own kind of mystery alive: a tunnel, estimated at somewhere between eight and nine kilometres long, believed to connect Derinkuyu to Kaymaklı, the other major underground city in the region. The tunnel is not currently passable, and its full extent has never been completely mapped. Whether it represents a single planned corridor or a patchwork of connected excavations built up over centuries is not settled, and Earth Curiosa is not aware of a study that resolves it definitively. What is clear is that Cappadocia’s underground world was never a single isolated structure. More than two hundred underground settlements have been identified across the region, in varying states of excavation, suggesting a landscape where entire communities could, in theory, move underground across considerable distances without ever surfacing.
What Derinkuyu Leaves Unanswered
Derinkuyu resists a tidy conclusion, and that seems appropriate for a place whose defining feature was concealment rather than display. Historians are confident about the broad outline: Phrygian origins, Byzantine expansion, use as a Christian refuge during Arab raids, and intermittent habitation across the centuries that followed. They are considerably less certain about smaller details, including exactly how deep the full eighteen levels go, what the unopened tunnels connect to, and how coordinated the movement between Derinkuyu and its neighbouring cities really was at any given point in its history.
What stands without much argument is the scale of the commitment involved. Carving a functioning city into rock, with the ventilation, water access and defensive architecture to support tens of thousands of people for weeks underground, was not a project completed by one generation for one crisis. It was maintained, adapted and relied upon repeatedly, by people who understood that safety, for them, meant knowing exactly how to stop being visible at all.
Tourist Information
Location: Derinkuyu Underground City, Derinkuyu, Nevşehir Province, Turkey, approximately 30 km south of Göreme and around 10 km south of Kaymaklı.
Opening Hours: Typically 8:00 am to 7:00 pm during the summer high season, and 8:00 am to 5:00 pm in winter, with last entry roughly an hour before closing. Hours can shift seasonally, so checking the official Turkish Ministry of Culture and Tourism museum website before visiting is recommended.
Typical Visit Duration: Around 45 to 90 minutes, depending on group size, pace and how much of the site’s eight open levels a visitor chooses to explore.
How to Get There: Most visitors arrive by car or organised tour from Göreme, Nevşehir or Ürgüp, a drive of roughly 30 to 40 minutes. Public dolmuş minibuses run from Nevşehir to Derinkuyu, though connections from the smaller tourist towns can be slow and infrequent. A private tour or rental car offers the most flexibility, particularly for visitors combining Derinkuyu with Kaymaklı in a single day.
Admission: Tickets are not free. Prices for foreign visitors change periodically, so travellers should check the official Turkish Ministry of Culture and Tourism website or the Museum Pass Cappadocia programme, which covers Derinkuyu alongside several other state-run sites in the region, for current prices and booking information.
Accessibility: Derinkuyu is not wheelchair accessible. The site involves steep, narrow staircases and low, cramped passages, some requiring visitors to crouch and walk single file for short stretches. It is not well suited to visitors with mobility limitations, serious knee or back problems, or significant claustrophobia. Children generally manage the site well and often enjoy it, though supervision is advised given uneven floors and low ceilings.
Facilities: Toilets and a small visitor centre are available near the entrance, along with parking. Cafes and shops are located in the town above rather than inside the site itself.
Best Time to Visit Early morning or late afternoon, particularly outside the summer months, to avoid the crowds that build during midday hours on popular multi-site day tours. The interior remains a constant 13 to 15 degrees Celsius year round regardless of the season above ground, so a light layer is worth carrying in any weather.
Things to Know Before Visiting Derinkuyu
- Wear sturdy, grippy shoes. The stone floors are smooth from centuries of foot traffic and can be slippery.
- Expect to crouch and duck through some passages for stretches of ten to twenty metres.
- The route is one-way in the narrower sections and clearly marked with arrows.
- Photography is generally permitted, though flash and tripods may be restricted in some chambers, particularly the church.
- Consider visiting Kaymaklı on the same day if time allows. The two sites are around ten kilometres apart and offer a useful contrast in scale and layout.
Nearby Places of Interest
- Kaymaklı Underground City, roughly 10 km north
- Ihlara Valley, a scenic gorge with rock-cut churches, a common pairing with Derinkuyu on regional day tours
- Göreme Open Air Museum, around 30 km north, with its cluster of rock-cut Byzantine churches
- The fairy chimney valleys around Göreme and Uçhisar
Further Reading and Resources
- Books: Eastern Turkey by Diana Darke, which covers Cappadocia’s underground cities within a wider regional context
- Books: Bilingualism in Ancient Society, edited by Simon Swain, J. Maxwell Adams and Mark Janse, for readers interested in the linguistic history of the Cappadocian Greek communities connected to the site
- Museums: The Nevşehir Museum, which holds artefacts recovered from Cappadocia’s underground settlements
- Official websites: The Turkish Ministry of Culture and Tourism’s museum portal, for current hours, prices and site announcements
