Puma Punku
In
the highlands of Bolivia, the stones of Puma Punku tell a silent story
of forgotten genius. Built around 536 AD, its blocks are cut with a
precision that seems to defy the era, fitting together without mortar in
a way that still puzzles engineers today. The site, whose name means
'Door of the Puma,' stands as a testament to the Tiwanaku civilization's
mastery of stone. 
- via Untold Ancient Histor
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