[Jonty30]

Build me a pyramid and I will be impressed.

[Bob434]

or a coral castle (interesting story about that in florida about a man with tuberculosis who built one from coral- huge blocks- noone knows how he did it- )

https://www.livescience.com/41075-coral-castle.html

[Hootowl]

Many, many years ago I read an account by a missionary of watching Tibetan monks lift large rocks into place on a wall by using sound.