Discover the incredible Sacsayhuamán, an ancient fortress near Cusco, Peru. Built over 500 years ago, this Inca structure features stones so precisely cut that not even a piece of paper can fit between them—without any mortar! How did the Incas move stones weighing over 100 tons? And why was Sacsayhuamán so important to the defense of the Inca Empire? Dive into this mystery and explore the engineering genius of this ancient wonder!
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