Nevşehir Castle and Underground City is a unique historical complex located in central Turkey, in the famous Cappadocia region. The castle itself, perched on a hill, has long been considered a symbol of the city of Nevşehir. A true sensation occurred with the discovery of a vast underground city beneath it. Initial finds were made in 2013 during construction work in the city fortress area, and in 2015, its grandiose scale—especially the part directly under the castle—was confirmed. It is estimated that this could be the largest such structure in the world.

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This ancient underground city is a self-sufficient complex with surprisingly sophisticated infrastructure. Complex systems of ventilation shafts and water channels were discovered here, providing residents with the ability to exist independently for long periods without coming to the surface. The scale of this underground settlement is striking: preliminary data suggests its area exceeds the total area of all previously discovered ancient underground cities in the region.
Experts estimate the age of the Nevşehir underground city at approximately 5,000 years, placing it among the oldest underground structures on the planet. Remarkably, this grandiose creation, the discovery of which began in 2013, immediately captured the attention of researchers and travelers from all over the world, opening a new chapter in the study of Cappadocia's rich history.