Okay this is only a theory. having looked at the picture and the maps and with some recollection of the old mall. i would have to guess that was the old radar tower in the picture. The tracks would go through the brickyard so there would be debris west of the tracks. it wasnt Oak Park but probably two blocks east. Also, it is interesting to note that looking at the old air photo that Grand Ave was rerouted which is still evident today looking from satellite.