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#7 – Great Pyramid of Giza (Egypt)
One of the most mysterious architectural masterpieces!
No one can say for sure who has built the Pyramids: humans or aliens. What we know for sure its that it is one of the most mysterious and popular tourist attractions. Jean-Pierre Houdin (French architect) has calculated how much the creation of a similar project could cost today. The amount is impressive - 5 billion dollars.
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