I spent a long time at La Defense in Paris trying to get a good photo. It is such a big structure that it is hard to get far enough away to really show it all, but then you lose all detail and the perspective becomes uninteresting. I never did get a photo that I really liked.
As I was returning from the back side of La Defense I looked up at one of the office buildings nearby and was very excited by the reflection of this cloud in the windows. The cloud is obscuring the sun and so was very brightly lit. This bright cloud superimposed on the grid work of this office building made for a striking image.