Lost Civilization of the Grand Canyon
the Grand Canyon is a
major natural phenomenon, but it is also a place of deep historical mysteries and oddities as well. One of the most unusual of these is the claim that somewhere under the earth here once ruled an advanced civilization with unknown origins and who have become lost to history, which supposedly inhabited a complex cave and cavern system that they left behind to sow bafflement and speculation with their passing. It is a very curious, far-out case that, if real, could shake our historical perceptions to the core.
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