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15 SECRET Underground Cities and Facilities

Join us for today's video as we explore the 15 amazing Underground Cities and Facilities. These subterranean havens range from ancient dwellings carved into cliffs, to modern marvels of engineering. We will learn, there is an entire world built beneath our feet. Let's begin with number 15. #cities #facilities #underground #top15 Several segments are licensed under creative commons https://creativecommons.org/licenses/... For more video information, please visit our website. The Top Fives show brings you informational and entertaining top five videos! Join us and subscribe for more. Follow Josh on Instagram! Founder and producer of the Top Fives show. Stay up to date with the channel and everything YouTube and business related!   / joshuajosephbaker   Follow us on Facebook!   / topfivesyoutube   Contact us via the email form here: https://www.youtube.com/topfives/about Note: The videos featured on the Top Fives channel are for educational and informational purposes. If you have a good idea for a video, leave us a comment! We try to read each and every comment made.