I passed by the Hotel de Ville (Paris town hall) yesterday and saw that they had planted a huge forest in front of it. I thought it was meant to promote the "greeness" of Paris or raise awareness on the need for more trees and less concrete in Paris, but no... It's to help Parisians remember the role played by the forest during WWI! Far fetched?! Totally, but still nice to see, especially since this square is generally used for much less greeny business than this!