The Disturbing Ancient (20,000 Person) Deep-Underground CITY of Derinkuyu (Bright Insight)

The lost ancient underground city of Derinkuyu housed an astonishing 20,000 people, was 18-levels and a staggering 280ft (85m) deep. The only thing more bizarre than this enigmatic marvel of engineering is that we do not know exactly who built it, how, why or even when...



The lowest levels of this site have been sealed off. Is this another situation where the authorities don't want the public to know the full truth about this site? 

[Posted at the SpookyWeather2 blog, December 7, 2025.]