This is just a small section of an incredible mural on the wall outside the Del Mar Library. An amazing number of old gears, cutters, and assorted cast iron parts were used to add texture and interest to the wall.
Nice shot.. I like the different textures...I wonder what it would look like if you stood close and aimed your camera across the wall? The relief of the stones and pieces might be just another great photo like this one.
One of these days we will meet, I was at the Del Mar Farmers market at about the same time. See my PaD. This wall is fab, but to get a bigger picture you will get run over by the traffic.