Close up

I used to have a subscription to Owl magazine. This was a while ago. One of my favourite parts was the close-up picture where you had to guess what you were looking at.

Can you guess what this is?
Let's make it a multiple choice question. Is it
a) a Chinese healthy ball?
b) a road on a snowy day?
c) a pair of pants I wore back when I had said subscription?
d) the mighty Mississippi?

Yes, it's d, flowing under a pedestrian bridge which served as the look-out to the collapsed I-35, which you couldn't see too well. You could, however, see lots of pedestrians, a pretty, hazy skyline and this interesting view of sludge down below.