single photos Watts Towers. Four photos stitched together

Did you really stitch 4 photos together? I can't even tell. This is excellent! How did you do it?

Thanks for taking a look.  The stitching is done through the editing software that came with my camera (a Canon A720).  It's really pretty simple as long as you keep the exposure the same from photo to photo, the software does all the work.  All four photos were taken with the camera in horizontal orientation, moving up with each shot.  If interested, I have a set of stitched photos on my flickr page. http://www.flickr.com/photos/stinshoff