this may make some of you jealous but here goes.
I'm lucky enough to work in the Bodleian Library, the library for the University of Oxford. we have a vast collection of stuff, so much that our storage areas go underground and there are tunnels under some of Oxfords busiest streets to link it all up. an amazing place. we have the original drawings that stukeley did for both stonehenge and avebury, and they are less than a minutes walk away from where i am now typing this at.