Girders!

I know there's a gaping great hole in the middle of the picture with nothing but sky in it. Unfortunately neither a golden eagle or a WW2 Spitfire happened to fly by at the time, so maybe some time later I'll experiment with Photoshop and see what I can put into the space!

I choose a small aperture & focussed the shot on the middle beam. This seems to have worked out the way I wanted it to.