what people should look in to is what makes up those huge stones and the little ones too. highly conductive.
do you know why there is a fence around it now? it cos there was a group of hippys camping there some times in the early 90s. a park ranger of sorts and a police officer were near and could see lightning crashing over and over on to stone hendge and could hear very loud screams. when they got all the way there they could not see anyone there. they stayed a little back until the lightning stopped. by the time they walked in the hendge they could not see anyone, only three tents, a fire still burning well, bags of camping stuff and five sets of clothes just sitting on the ground. each piled up like shirt ontop of pants and pants ontop of shoes.
since then no one is aloud near it on winter solstis or summer solstis.
i remember watching this report with my friends over and over.
hope this helps.