Archaeologists excavating a 2,000-year-old settlement in Spain have discovered a granite stone with two completely different carvings on opposite sides.

As above so below?

Sources claim these three mysterious mixed walls in Catalonia, Spain, were built in one go by Roman armies. 
But looking closer reveals a bizarre patchwork of monster boulders and polygonal cuts and other add-ons of concrete and square blocks that together don't make any sense. 
Breaking down the "Frankenstein" walls that defy official explanations.
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https://youtu.be/swP5XRm8IBI