Stonehenge and its Environs 134
Image by Chance

nigelswift wrote:
The interest increase in Avebury between 1900-1940 in interesting and I suppose coincides in the latter period with Keiller's work there. The 2000 increase would be what?

It probably picks up the then Lord Avebury.
Not sure about recent years. Perhaps it got "discovered" by more people.