Puma Punku
Massive H-shaped stone blocks, machined to tolerances of fractions of a millimetre, built at 3,840 metres above sea level by a civilisation without writing or iron tools.
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History & Lore
Puma Punku ('Gateway of the Puma') is a temple complex within the Tiwanaku site in western Bolivia, built between approximately 500 and 900 CE. Its defining feature is the precision of its stonework: the H-shaped andesite and red sandstone blocks — some weighing over 130 tonnes and transported from quarries 90 km away — are cut to tolerances of ±1 mm with perfectly repeating notch-and-groove joints, drill holes of consistent diameter, and smooth faces achievable today only with machine tools.
The Tiwanaku civilisation left no writing, making their engineering methods unknown. Experimental archaeology has demonstrated that the blocks could have been cut with stone and bronze tools given sufficient time — but the regularity of the repetitive cuts, consistent across hundreds of blocks, suggests a level of standardisation with no known parallel in the ancient world.
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