So one self assignment I gave myself in Venice was to photograph the bottoms of bridges. I was very surprised how much character each bridge had, built out of completely different materials than the bridge before it. I used a slow shutter speed to de-emphasize the actual construction and to bring out more of the color and pattern each bridge had. Check out the gallery right here at http://www.greginda.com/personal-work/venice-bridges/
Or enjoy these two samples here.