What’s mysterious about its construction, is it the sourcing of the stones or some precision in the circle
> The 1,600 participants exerted over 180,000 pounds of force on a 2-inch thick nylon rope designed to withstand only 57,000 pounds. Amidst cheers, the rope violently snapped; the sheer rebounding force tore off the left arm of the first man on each side. [1]
https://priceonomics.com/a-history-of-tug-of-war-fatalities/
https://en.wikipedia.org/wiki/Slipway#Slipways_in_ship_const...
- people can routinely construct ships weighing ~1000X the weight that any one worker (or crane) could lift.
There was a guy who rebuilt a section of Stonehenge using only techniques that could have been used thousands of years ago, and explained how it was possible to build it.