Kaymaklı Underground City

Kaymaklı Underground City is one of the most famous of the Cappadocia underground cities in the Nevsehir province of central Turkey. It was built as early as the 7th century BC and was expanded by early Christians as a way of hiding from religious persecution. The city has a complex and organized structure, with living spaces, stables, communal kitchens, a church, and a graveyard. It spans over 8 levels, although only 4 of these are open to the public. The city was used for protection from Muslim Arab raids during the Arab-Byzantine wars and was also used by Christian inhabitants as protection from the Mongolian incursions of Timur in the 14th century. The tunnels are well-lit and spacious, making it a relatively comfortable place to explore. The city has a unique ventilation system, with ventilation shafts that run all the way to the lowest levels, providing a constant clean air supply. The city's architecture and layout are impressive, with narrow tunnels and massive round stone boulders that were used to block doorways during attacks