Grate Photo

I spent the walk from work looking for square things.

'Square' is the theme in the weekly photo challenge I have with some Facebook buddies, you see. Finding square things is harder than you think. Lots of things that you think at first glance are square are in fact rectangular. This grate is not only square, it has numerous squares within it. If there's a prize for the photo with the greatest number of squares, I'm in with a shout.