I have a similar photo to this that i took a while ago. This would be a much more interesting shot if you took this as a birds eye view and looked into the spiral. Just a thought.
I think this picture would have been a lot better if the spinny thingy was more brighter and the background was darker it wouldve made a better contrast.
Simple and effective photo. Meets the intent of the challenge IMO. I can picture the voting trolls thinking that the center pole qualifies as a straight line. The photo has a sharp focus and good DOF.