Just thought I'd see what a HDR'd version of this photo would look like, not the best but not too bad. And in color looks just as good as the black and white one I think.

In case anyone is at all interested:
The Trevi fountain is at the ending part of the Aqua Virgo, an aqueduct constructed in 19 BC. It brings water all the way from the Salone Springs (approx 20km from Rome) and supplies the fountains in the historic center of Rome with water.