![Picture 10 Astounding Underground Cities Around the World](https://unbelievable-facts.com/wp-content/uploads/2018/11/5-450x260-c-default.gif)
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![Picture 10 Astounding Underground Cities Around the World](https://unbelievable-facts.com/wp-content/uploads/2018/11/5-450x260-c-default.gif)
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The Five Siblings of the Ulas Family Who Walk on All Fours 6.6k views
by Unbelievable Facts 6 years ago
![Picture A Man Knocked Down a Wall of His Home and Discovered the Forgotten Derinkuyu Underground City](https://unbelievable-facts.com/wp-content/uploads/2018/04/Derinkuyu-Underground-City-1-450x260-c-default.jpg)
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Gobekli Tepe, the World’s Oldest Megalith and Possibly World’s First Temple 3.1k views
by Unbelievable Facts 6 years ago
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