And yes people are able to explore and come up with ideas for how they were built...people have actually looked so close now that they have worked out that not ALL of the stones used were stacked alone - they found evidence of a mixture, water bubbles found in the stone show they used some sort of cement like mixture.
I do find them fascinating.
Thing is though - evidence that the Arc existed has yet to be found. People still walk mount Ararat hoping to find something to attempt to prove this story.
I am more than happy to accept people came up with this story as a metaphor for something though.