Stonehenge

I agree with the human transport thing, look at Orkney they probably used seaweed to move stones, so why not make sledges down there. Would have aurochs possibly been used to help pull these things?

I've always maintained that 50, better still 100 fit blokes could CARRY the largest of bluestones indefinitely using an arrangement of ropes to share the weight.

There's a reconstruction, a film, a book and a lecture circuit in it if you want. Wish I was younger.