Recent work from Pez in London, Barcelona , Miami & Bogota.
Big cat by Utopix in Villejuif, Paris. The eyes are synchronized with the traffic light. [Stopmotion gif here]
A bit late but here is a selection of very good & interesting photos posted last fall on ekosystem.org. Photo of the TGV by OKS crew.
2 loooong walls by SLAK from Russia. Direct links to the hi-res pix: 2012 wall + 2011 wall.