This abstract image takes some time to grasp but after you have looked at it for a few minutes you might see that the foreground texture at the bottom is familiar? It is embossed chrome metal, in this case the back of a bench but this material is also common in lifts (elevators). The rest of the textures are of buildings, boats, a station, some water, sky and the reflection of an old dock-side crane.
Site News: Later today I will be moving the location of the server that hosts this site. If all goes well you probably won't notice it, but if it goes wrong I could be without a site for a few days. Fingers crossed.