Arch City

The main source of light in this image is the bright white light shining from the sun.The time of the day is either early morning or evening judging by the low angle of sun and the dark sky on the opposite side of the image.The position and angle of the sun backlights the arch in the image, revealing its form.However the beam of light also hits the arch from the side, revealing the detail on the wall.All the spires in the background are lit from the back and the side, revealing their form.