Platform mound and ruined structure at the south-western edge of the Tiahuanaco complex on the Bolivian altiplano, and the single most cited site in the ancient-technology literature after Giza.
The blocks
The H-blocks of grey andesite carry flat faces, sharp interior angles and drilled features, and are close enough to identical that they were plainly made to a standard. The alternative argument is that the precision exceeds what stone tools and abrasives can produce. The archaeological answer is modularity: the blocks were made repeatedly to one design, which is what produces the uniformity, and the surfaces are consistent with abrasion and with the hammerstone-and-sand methods documented across the Andes.
The date
Radiocarbon from the platform mound places construction around the sixth century AD, with the wider Tiwanaku florescence roughly AD 375 to 700. That is fifteen thousand years later than Arthur Posnansky’s astronomical date for the complex, which Fingerprints of the Gods and The Anunnaki Chronicles both carry, and it is the largest single divergence between the alternative literature and the field it discusses.
Connections
Tiahuanaco · Arthur Posnansky · Fingerprints of the Gods · The Anunnaki Chronicles · Graham Hancock · Zecharia Sitchin · Ancient Machining · Ollantaytambo · Baalbek