Sweet !
it's only Satanic if you look at it from a different Angle with the goats ears straight up .
interesting non the less . for 1939 Ball Field ? School ? farmers field ?
church property for christmas pageant doings or ?
the buildings upper right look like it could be a farm, school, fairgrounds
or park with a pool.
I'd say too public for Witches Coven doings. unless it was a Public celebration of
witchcraft or Halloween. & as far as I now,
Wicca is a new thing only really brought out in the 50's.
and only started getting big attention with the latest
enviroMental Hippy women's movement.
did it give a Month and Day for the Flyover ?
did you check other years ?
I would say search it.
I wanna Search it

of course that's out
but Seriously odds are it was done for a reason & not just by one lonely person
to know about and snicker to them-self . so there was probably allot of foot traffic there