I reported on the Underground Cities of Cappadocia back in 2014. What I didn’t realize then was how vast these underground cities are. There is a network of over 200 underground cities in the Cappadocia region of Turkey. Some of these cities are at least 11 levels deep (total of over 200 feet deep) according to National Geographic. Scientists are not sure how they were built.
“One of the characteristics of Cappadocia is having plenty of underground cities. It’s known that there are more than a hundred underground settlements in the region and many of them are not open for visits. The underground cities, which are guessed to be used since the Bronze Age, used to be settlements mostly in Byzantine period, doubtless. In this period, increasing invasions forced local residents to build underground cities for protection and religious purposes.