The Incan stonework is famous for it’s large stones (some over 100 tons) that fit so precisely together that “not even a knife could be inserted between the joints.”
How the Incans were able to transport these massive building blocks and handled is something we don’t quite understand today. What we do know is that the cutting marks on some of the stone blocks are very similar to those found on the pyramidion of the unfinished obelisk in Egypt.