At East Kennet, "There was a church on the same site as the present one in the 12th century... local poverty and negligence on the part of the owner... resulted in reports in the 16th and 17th centuries of the decay of the church fabric, and by the 19th century the church had become dilapidated." (from the church info sheet). Seems like the old church was completely demolished in the 19th century and then a new one built in the Early English style. That might account for there being nothing of megalithic interest in the church foundations. However, the site does have a 'pre-Christian feel' to it: it's built on a mound, yew tree about as old as the one at Alton Barns (younger than the one at Alton Priors which Nigel spotted last year and which might indicate that Alton Priors is a pre-Roman site while Alton Barns has never been anything other than Anglo-Saxon). There's a pond along the outside of the East Kennet churchyard wall with one large sarsen (maybe two sarsens as there's something completely covered with ivy) at the pond's edge. There's also another large sarsen in a nearby garden and a heap of broken sarsens by the northern wall of the churchyard. Got the feeling the original church may have been built within the circle not on it.
The idea that Stonehenge was a place of healing (and by extension a place of learning?) is very exciting. The thought that Stonehenge was known throughout the ancient Western world, and a place where people would visit from afar to learn, be healed or just to marvel, is truly astonishing.