Tension
I think this type of composition has a tension in it. The opposing lines of the bridge and the railing are in conflict, where your eyes are pulled to one side and then immediately to another (or maybe not, what do I know? :) ). But either way, I like this type of composition. In the photo the New Bridge in Bratislava.
HDR from three shots, taken with Canon 450D with Sigma 10-20mm lens, from a tripod.
