I love every art that has to do with street-art. Especially when you change signs. I see a lot of funny arts here in my hometown, but they're not as good as these ones from the project PANOS 2013
a collaborative project that takes the work of artists from around the world, in the form of fake road signs, and turns the streets of Lyon, France into an enormous gallery without walls. The round red and white signs look enough like real European traffic signs that you might take them for granted, but weird enough if you notice them to make you stop and think. This project has a delightful sense of humor, lots playful absurdity and a wonderful scale. Panos 2013 is the second edition of this project. You can have a look at the first edition in the Panos 2004 section.
More pictures and other projects on Bopano.com