It must be at least twenty years ago that I took this photograph, in the old fort at Al Ain, in the United Arab Emirates. However I still recall thinking at the time that it was a very good example of symmetry.

The characteristic roundness of these old jars is mirrored in the circle of cobblestones on which they stood (and, for all I know, still do) and also the low stone wall that is visible behind.

Lens-Artists Challenge: Shapes of things