Subterranean Worlds: Veins of the Earth – Mexico (Full Documentary)

Featured Image: Karst cave with underground river exiting at Tolantongo, Hidalgo State, Mexico. CREDIT: Thelmadatter SOURCE: Wikipedia (Public Domain)

From youtube uploaded by journeymanpictures

Published on Apr 29, 2013

For downloads and more information visit:http://www.journey.webbler.co.uk/6509…

BEST IF VIEWED IN FULL SCREEN MODE

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