[Obama_Is_Sabotaging_America]

I just confirmed those are wheel tracks. I don’t know what “screw” you are talking about.

[Sir Gawain]

Bottom left.

[Vermont Lt]

Go to the bottom left of the picture. Now count three mounds towards the center. It looks like a screw connecting mound 3 to 4.

I have no idea what the scale on this thing is.