Mycenae - Cyclopean City

[Byrd]

cyclopean masonry, wall constructed....found on Crete and in Italy and Greece. Ancient fable attributed them to a Thracian race of giants, the Cyclopes, named after their one-eyed king, Cyclops. Similar walls, though not called cyclopean, are found at Machu Picchu, Peru, and at several other pre-Columbian sites in the New World.
https://www.britannica.com/technology/cyclopean-masonry

This kind of construction is found all over the world, and is basically "discovered" by people who ask "how do we get a tight join between stones?"  It's part of the easy early discoveries, including "I wonder if I can use dried mud to carry fire coals?" and "I wonder if I dry this meat can I still eat it safely?" and "can I make a rope from this grass?" and so forth.  Once people settle down, making houses and other buildings from stone becomes something they want to do because they fall down less often than tents or mu brick, etc.  

And that leads to coming up with stone technology.

A lot of the shows on "unanswerable archaeology" are by people who actually can't figure out how these things are done ... and therefore see the result as something "science can't explain."

The walls are nice, but if someone advanced had REALLY done it (or explained how to do it - or if it had been done with "advanced technology") then the blocks would be nice and square and identical sizes (much easier to place and shift and construct) and the surfaces would be nice and smooth.