Leaning against the stone wall at the foot of what was once an Inca palace in Cusco, posing for a photograph like millions of tourist before me, I notice how the huge rocks fit together along five or more sides. It would be a Herculean task to build this wall, and it would be just as hard to take the wall apart.
The Spanish Conquistadors learned this the hard way after demolishing as many Inca buildings as they could. When it came to these massive foundations they ran out of energy.
The cornerstone of Inca culture is literally their stone
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