Aırnas Underground City is an underground structure located in Kayseri's Aırnas Neighborhood, built starting from the 7th Century BCE and used by Phrygians, Romans, and Byzantines; it is characterized by its narrow corridors, stone wheel doors, and ventilation system.
Aırnas Neighborhood, approximately 30 kilometers from Kayseri city center, is an interesting stop where most visitors come only for Mimar Sinan's house but also encounter an underground city in the same area. Aırnas Underground City stands out with its rock-carved passages, rooms, and living spaces in the Aşaı Pınar area at the entrance of the town. Some parts of the structure date back to the BCE periods, and judging by the niches and paintings, its most intensive use was between the 1st and 13th centuries CE.
As you explore the underground city, you first encounter a long, gradually descending narrow corridor; rooms open on both sides of the corridor. Visitors report having to bend down and sometimes pass through very narrow sections. One of the most distinctive elements of the structure is its stone wheel-shaped doors; similar ones can also be seen in zkonak Underground City. The city's ventilation system is also noteworthy from the perspective of the engineering understanding of its period. Visitor comments frequently express a feeling of being "carved out like an ant's nest" inside and a curious tension about whether you will find the exit.
Outside the underground city, there is a small parking area, seating gazebos, and a stream flowing nearby; this makes it possible to have a picnic after the visit. Since Mimar Sinan's house and the Koramaz Valley Museum are also located on the same route, it is quite practical to see all three in one go.
Related discoveries: Historical Sites, Kayseri historical sites, Kltepe Ancient City (Kaniş-Karum).
Guide's Note
What is Aırnas Underground City?
Aırnas Underground City is located in the Aşaı Pınar area at the entrance of the town, in the Aırnas Neighborhood, which is part of Kayseri's Melikgazi district. In the geography of the Cappadocia region, known for its underground cities, this structure within Kayseri's borders has not yet been fully excavated and opened; the section currently open to visitors constitutes only a part of the entire complex.
The structure shares similar architectural features with other Cappadocia underground cities, known for their interconnected tunnel systems, rooms opening into corridors, and stone wheel doors. It is believed to have been first built by the Phrygians; in later periods, the Romans and Byzantines also used this area. The rooms served as dwellings, storage, and shelters; the structure was also equipped with special ventilation channels.
Best Time to Visit
While the underground city can be visited year-round, spring (April-May) and autumn (September-October) are the most enjoyable periods due to both mild weather and surrounding greenery. In summer, although it is hot outside, the underground sections naturally remain cool. If you visit in winter, your opportunities to use the surrounding picnic area may be limited.
Since local visitor density can increase on weekends, it is advisable to prefer weekday mornings for a more comfortable experience in the narrow corridors.
How to Get to Aırnas?
The distance from Kayseri city center to Aırnas is approximately 30 kilometers. You can go by private car via Melikgazi in the direction of Aırnas; road signs direct you to the underground city. Kayseri Metropolitan Municipality has bus services on the Aırnas route; it is possible to reach both the underground city and Mimar Sinan's house by this bus. We recommend calling the municipality's transportation line for current bus schedules and route information.
Route Suggestion: A Day in Aırnas
Aırnas offers a route that fits into a half-day program on its own, but turns into a full day when several points are combined. First, after exploring the underground city, you can visit Mimar Sinan's house, which is within walking distance. Then, moving on to the Koramaz Valley Museum completes the historical context of the region. You can spend lunchtime in the picnic area next to the underground city, in the gazebos by the stream. On your return to Kayseri city center, you can also enjoy the view of Mount Erciyes.
Photography Spots
The most interesting photography spot in the underground city is the stone wheel-shaped doors opening into the corridor. These doors are both architecturally unique and ideal for framing. Silhouette photos taken with backlighting in the narrow corridors also yield impressive results. Outside, the riverside and green picnic area create a beautiful contrast when framed with the entrance to the underground city. An additional light source (flashlight or auxiliary light) will be useful inside for a phone camera.
Things to Know Before Visiting
The corridors are quite narrow and gradually descend; you need to proceed by bending down for a long time. This experience can be challenging for visitors who suffer from claustrophobia. When going with children, caution is required due to the narrow structure of the corridors; however, visitors frequently state that children over 7-8 years old enjoy such exploratory trips.
It is stated that there may not be security guards inside; it is recommended to bring a flashlight. Since there are still sections that have not been fully excavated and opened to visitors, it is important not to deviate from the designated route.
What to Eat Nearby?
Since Aırnas itself is a small neighborhood, it does not offer extensive food and drink options. It is stated that there is a small restaurant near the underground city. For those planning lunch, the most practical option is to prepare a picnic and eat in the gazebos by the stream. For those who want to taste Kayseri's unique flavors such as mantı, pastırma, and sucuk, there are many options available on the return to the city center.
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