http://news.yahoo.com/blogs/sideshow/origin-stonehenge-rocks-discovered-154814786.html
Researchers in the United Kingdom have finally solved a major piece of
Stonehenge's enduring mystery: the place of origin for some of the
ancient structure's most-famous rock formations.
The National Museum Wales and Leicester University have identified the
source as Craig Rhos-y-felin, located more than 100 miles from the
Stonehenge site. But this discovery, of course, just opens on to
another mystery--namely, just how and why an ancient culture carved
and transported the giant stones over such a great distance.
...
And how it could all be done by one man, if Nigel is right.