From ancient technology that shouldn’t exist to imperial tombs, we can’t enter, there’s almost no end to the unknown. As science advances, perhaps we will uncover more of its secrets, but until then, we’re pretty clueless. Ready to have your world rocked by the problems we can’t solve? Here are 25 Unbelievable Things Found On Earth We Can’t Explain. Essentially a giant labyrinth, it has 11 levels that descend about 280 feet (85.3 meters). It’s difficult to age the structure, and no one really knows who built it or why.

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