Coral Castle, an impressive stone structure built by Edward Leedskalnin, south of Miami in Florida. Not surprisingly, Coral Castle has continued to mystify modern scientists as to the method used in its construction.
Another name I came across Thor Heyerdahl famous for the Kon-Tiki expedition of 1947,,,Heyerdahl speculated about how the huge stone statues on Easter Island were put in place when he reenacted the work by carving, moving, and erecting one,,,what Heyerdahl was able to demonstrate, the job can be done using one particular method,,,
I'm attempting to find better source material besides a mere passing mention of this aspect of Heyerdahl's work,,,