#48, near Széchenyi Bridge, Budapest
Stencils are about as straightforward as can be, but the logic of this wall escaped me when I took the photograph and continues to puzzle me to this day. A simple white wall stretching alongside the River Danube, it is covered with the numbers "48", "56", and "89". The sizes vary and the placement of the numbers is jaunty and random, but everywhere you look are these three numbers repeated again and again. Now maybe I've just been watching too many episodes of The Prisoner, but I couldn't help but feel someone was trying to send me a secret message. But if there is a code hidden in this image, it remains, as of yet, uncracked.