Bill, Richard has a point there. You can use this effect creatively, but in that case, you need to get very extreme at that. With some photoshop work, you can also correct the distortion digitally. (I attached a quick and dirty corrected copy of your photo) Furthermore, I believe that anything from a 50mm lens upward will not have this problem, as a 50 mm lens has an angle almost equal to the viewing angle of the human eye.
It is a good composition, though, and a lovely scene. A pitty it is a bit small.
It's generally a good idea to get the horizon level in landscape/architecture shots. Also, you have got some perspective distortion (the buildings are leaning back) which results from using a wide angle lens pointing up. Try shooting from further off and use a telephoto lens to avoid this, or else get in close and use the effect creatively.
0 
