See that barrier of rusty steel in the distance, behind the people, forming a gate toward the Place de la Concorde? That is another Richard Serra sculpture. You will see it better by clicking on the picture to enlarge it.
Now I regret not having walked closer to be near it but on that afternoon my feet were whining relentlessly to walk back to our room and change to a horizontal position for a while. It's one of the things I miss so much from Europe, the ability to walk a lot on a daily basis. I am not used to it anymore!