PARK(ing) Day: User-Generated Urbanism from Brandon Bloch on Vimeo.
It's called PARK(ing) Day! Citizen Activists around the globe turn parking spaces into mini-parks for a day to demonstrate the need for more urban green space. The annual event is organized online, but staged offline in dozens of cities on every continent around the world. It's a demonstration of the power of social media and international collaborative activism... and a great way to have fun and relax.
http://parkingday.org/