https://www.youtube.com/watch?v=yEbpCeFooFwPuma Punku | Advanced Ancient Technologies & Magnetic Anomalies in Bolivia | Megalithomania
Megalithomaniac Hugh Newman and stonemason Jim Vieira (co-authors of 'Giants on Record') investigate Puma Punku in Bolivia, looking at the evidence of advanced technology and discover that many of the stones have specific magnetic anomalies, suggesting the builders had a high understanding of the subtleties of various types of stone. They are joined by Antonio Portugal, a Bolivian researcher, and they discuss technical and other more obscure possibilities as to how they could have created the site.