The underground cities of Cappadocia, dating back thousands of years, were built for defense and daily life needs and are among the most impressive engineering marvels in history. Derinkuyu, with its corridors descending up to eight floors and its advanced ventilation systems, provided shelter for tens of thousands of people. Kaymaklı, on the other hand, stands out with its wider horizontal tunnels and shared production areas. In our article, we share the floor plans of both cities, their historical background, the points you should pay attention to during your visit, and practical tips to avoid experiencing claustrophobia.