Construção das pirâmides

... no Egipto:
https://www.cnn.com/travel/article/giza-pyramids-ramp-scli-intl/index.html

Citando:
"Archeologists have spent centuries wondering how the towering pyramids of Giza were constructed thousands of years ago. Now, the discovery of a sophisticated ramp system has put them one step closer to solving the mystery.

The remains of the 4,500-year-old ramp was found at an alabaster quarry -- of the same period -- in an Egyptian desert by a team of researchers from the University of Liverpool, UK, and Cairo's French Institute for Oriental Archaeology"