The construction of massive underground caverns and structures, like those found in China and associated with ancient civilizations like the Mayans and Aztecs, involved moving millions of tons of rock with no clear record of the methods or the destination of the removed material. This lack of documentation fuels speculation about advanced ancient engineering capabilities.
Impact: High. The mystery surrounding these ancient feats of engineering challenges conventional archaeological timelines and suggests a deeper, more complex history of human ingenuity.
In the source video, this keypoint occurs from 01:47:33 to 01:49:37.
Sources in support: Ari Shaffir (Guest)

