Here's a Photoshop Phriday for you

Perhaps this has been done before, but when I saw the cathedral at Cologne, Germany, I thought it looked very evil. Impressive, but evil. Kern concurred, and thought that Sauron would live there. Hence, a little editing later:



This is the cathedral as viewed from the Rhine. Perhaps if I were more ambitious, I'd submit it to one of those sites that do these things often.