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10 mysterious geoglyphs around the globe

By: Bryan Nelson on March 5, 2014, 4:01 p.m.
Blythe Intaglios

Photo: Wikimedia Commons

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Blythe Intaglios

These remarkable intaglios (anthropomorphic geoglyphs) are found near Blythe, Calif., in the Colorado Desert, along the Colorado River. Created simply by scraping away layers of darker rocks to reveal the lighter rocks beneath, the figures have remained preserved over the millennia thanks to the dryness of the region.

Believed to have been originally created by the Mojave and Quechan Indians around A.D. 1000, the figures weren't discovered until 1932, when a pilot happened to look down and notice them.