I often carry my camera with me as I go about town just so I can take pictures such as these. The pictures are mostly architectural or streetscapes but it can be whatever catches my eye.
-- psst If the name of the picture ends with IMG.JPG, then it is an unretouched photo. Otherwise, if it ends with something like IMGa.JPG, I've probably cropped it, retouched it, or done some other mojo on it.