From biou comes these images from Athens. You can find more on the paralirima blog
Wooster(Noun)
A street in the Soho section of New York City.
Collective(Noun)
Of, relating to, characteristic of, or made by a number of people acting
as a group: a collective decision.
The Wooster Collective was founded in 2001. This site is dedicated to
showcasing and celebrating ephemeral art placed on streets in cities around
the world.