Created by French artist François Abélanet, "Quoi Croire" an anamorphic, "ephemeral" garden displayed in front of Paris' main city hall the "Hôtel de Ville".
More info (in French): :
http://www.paris.fr/accueil/accueil-paris-fr/une-anamorphose-vegetale-parvis-...
http://blogs.paris.fr/casepasseaujardin/2011/07/01/jardin-ephemere-2/
http://www.landarts.fr/exposition/anamorphose-vegetale-a-lhotel-de-ville-de-p...
via reddit.
