The <i>Comme si le Temps de la Rue</i> (according to a tourism page, "an
untranslatable poetic phrase"), a series of sculptures in a courtyard
near the Place des Arts.  Personally, I think they look like a cross
between humans and trees, though an official page claims they're
half-human, half-bird.  Until I read it online, I didn't notice the
things on the "arms" were actually in the shape of buildings.