Looking up at this building whilst walking along a street on a Sunday afternoon in Sheffield I knew it had to be photographed. At the time I wasn't sure what the building was, but looking down to the left I saw this was the Charles Street Car Park. According to the architects, Allies and Morrison, who designed this 520 space, ten floor car park this abstract and animated surface of the facade is composed of identical angled panels that are rotated randomly in four orientations. Each panel is made up of a single folded sheet of aluminium. It certainly makes for a unique pattern.