An exploration along the Colorado River on the Arizona-California border looking at four huge man-made geoglyph sites, similar to those in Nazca, Peru. Possibly dating to around 900 BC, these are still one of the biggest mysteries of ancient America. Includes exclusive aerial footage. The Book ‘Giants On Record’ is available at Amazon US: http://amzn.to/1MrVH5L and Amazon UK: http://amzn.to/1OxghHM and other outlets.
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