https://medium.com/storyangles/worlds-beneath-the-surface-1d3c7f3f6286
Worlds Beneath the Surface
7 Underground Cities Rival Derinkuyu
Across history, people built underground cities to stay safe and escape harsh conditions.
Derinkuyu in Turkey is deep, complex, and designed to protect thousands. It’s not the only one. Underground cities around the world show similar planning and purpose.






