Ran by it again the other day, to double check. It's actually right across from the radio tower, North of 82 but South of 84. You can almost overlook it.
This isn't the well-known wheat fields overlook, but is similar.
Co-worker of mine grew up around here. He knows some of these areas from before they were developed. Says the old church used to be for 'Klan meetings and whatnot, long ago. Had a bad rep for a long time, then naturally they cleaned it up and all that.
It definitely is a landmark!