This is very very interesting -- I just finished Hill's book on Stonehenge, which summarizes all the theories and views and excavations over the years (with lots of pain over its poor handling over the years). copyright 2008 and already out of date!

The archaeologist must be totally gaga over this one.

Me too, actually. As a student I hitched around
europe for awhile and still regret not stopping to see it when you could still walk into it.