What amazes me is how the Natioanl Trust have never finished Keiller's work at Avebury. He did the West Kenett Avenue and , the south inner circle and two quadrants of the great circle.
The rest of the site still has buried stones, readily found, readily re-erected and presumably not overly difficult to sort out which way up, either. All it takes is a bit of will from the National Trust.
Imagine if the east side of the circle were as restored as the west.
It's quite mad that we had to wait for so long for the, ahem, discovery of the Beckhampton Avenue, but it's totally nuts that the stones aren't being re-erected there too.