Derinkuyu Underground City
The deeper, better underground city — and the one that will tell you honestly whether you are claustrophobic.
Enough context, no spoilers
Why it matters
Cut into soft tuff over centuries and expanded by Byzantine Christian communities sheltering from raids. A villager broke through a wall of his house into it in 1963; it opened to visitors in 1967. The Ministry describes eight levels cleared out of a complex still largely unexcavated, with ventilation shafts and rolling stone doors that let a large population seal itself in.
What to know before you go
If you visit one underground city, make it this one. The comparison people are really asking about is Derinkuyu versus Kaymaklı, and the honest answer is that Derinkuyu is the better site and the harder one. It goes deeper, its main stairways and chambers are larger, and its engineering is more legible: you can follow a ventilation shaft with your eye from a lower level to daylight, and see how the whole thing was designed to keep thousands of people and their livestock alive while sealed in. Kaymaklı is wider, shallower and lower-ceilinged, and its connecting tunnels demand a more sustained crouch. Be careful with the numbers, because sources genuinely disagree. The Ministry states eight levels cleared out of a total footprint of roughly 4 km², of which only part is open. Guides routinely quote 85 metres of depth, which describes the known extent of the wider complex rather than a public staircase — the lowest point walkable by visitors is usually given as about 54 metres. Capacity estimates come from the same loose family of figures and should be treated as rough. On claustrophobia, do not talk yourself into it. This is not a corridor you can back out of casually — sections are one-way, groups queue behind you, and the connecting passages between levels are low, narrow and steeply raked. If enclosed spaces are a real problem for you, this is not the site to test it on; the entrance chambers alone will tell you within two minutes. One genuinely good piece of news: Derinkuyu and Kaymaklı are both in the Ministry's night-visit programme, running 1 June to 1 October 2026 from 19:00. A place with no natural light is exactly where night opening makes sense, and the evening slots are dramatically quieter than the coach hours. Hours are set locally, so confirm before travelling out.