Unexpected details are always a fun surprise, and every place seems to have them. While I've come to expect them in nature, it's nice to spot them in architecture as well. This one was pretty obvious and seemed somewhat out of place among the regular patterns found elsewhere in the structure. I like the randomness of the colors, textures, and shapes and how they come together in this composition. I have a feeling that neither the architects nor workman would have expected this to be a focus for photography.