Most wide-angle lenses have distortion at the edges, here is how to fix it in Photoshop!
Wide-angle lenses have a tendency to introduce distortion if the camera is not pointed straight ahead and perpendicular with the ground. Sometimes this distortion, which usually occurs along the edges of the frame, is visually pleasing and left in the shot. Other times, however, you may want to remove it, which can be done in post production.
The angle I had to use to shoot it resulted in some distortion of the horizontal lines at the top and bottom of the frame, which I could see in the viewfinder. As the fountain itself is curved, I would prefer to have these lines straight so as to not take away from the fountain. To do this, I used Photoshop CC 2015, though the process outlined here should be similar in other recent versions of Photoshop.