Advertisements
Did you know?
In 1963, a Turkish man discovered a mysterious room behind a wall in his home. Further digging revealed a network of tunnels that turned out to be part of an ancient multi-level underground city called the Derinkuyu underground city, which extends to a depth of around 279 feet and is large enough to have sheltered around 20,000 people.
![Picture Derinkuyu Underground City – An Ancient Multi-level Underground City](https://unbelievable-facts.com/wp-content/uploads/2022/07/338_optimized-450x300-c-default.jpg)
Dmytro Gilitukha/Shutterstock
Advertisements
YOU MAY ALSO LIKE
11 Spooky Facts That Are Deeply Unsettling 2.4k views
10 Bizarre Fashion Trends from the Past 3.9k views
Advertisements