Dunn is absolutely correct when it comes to the sarcophogi in the Serapeum...they are perfect boxes which leave him stunned and he categorically rejects the notion that that level of perfection - measured to within thousands of an inch over the entire surface, every surface of the inside of same- could have anything at all to do with hand polishing. uh uh.
The pyramids, despite what you would have people believe, are quite the enigma. Every Engineer who studies the place leaves with a sense of awe and amazement at what was accomplished there. The level of intellect it necessarily involved just staggers me and most everyone who reads/studies/watches the information about that place.