Name: 5 Mysterious Ancient Cities That Were Built UNDERGROUND! | Videos | Gan Jing World
Uploaded: 2017-10-20T04:00:00.000Z
Duration: 8 min 56 s
Description: What could be hidden in these cities? ➨Get tickets to the best show on earth!!! http://bit.ly/2skdZ9n ►Subscribe for more videos! http://bit.ly/1Mo6FxX ►C... | Videos | Gan Jing World

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What could be hidden in these cities?

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SOURCES:
http://www.history.com/news/history-lists/8-mysterious-underground-cities
http://www.messagetoeagle.com/11-mysterious-ancient-underground-worlds-that-remain-unsolved-to-this-day/
https://en.wikipedia.org/wiki/Wieliczka_Salt_Mine
http://www.ancient-origins.net/ancient-places-europe/timeless-stories-built-grains-salt-examining-masterpieces-within-polish-salt-020903
http://www.ancient-origins.net/ancient-places-africa/rock-hewn-churches-lalibela-ethiopia-00154
http://www.ancient-origins.net/ancient-places-europe/underground-city-naours-subterranean-settlement-complete-bakeries-and-chapels-021398?nopaging=1
https://www.historicmysteries.com/derinkuyu-underground-city-cappadocia/
https://www.ancient-code.com/15-things-you-should-know-about-the-underground-city-of-derinkuyu/
http://www.nationalgeographic.com/archaeology-and-history/archaeology/lost-city-petra/
http://www.ancient-origins.net/ancient-places-africa/magnificent-ancient-city-petra-jordan-00214?nopaging=1
https://en.wikipedia.org/wiki/Petra