The project has covered various cities around the world, below is the capture of Amsterdam from July 2008:
Carrying on the theme is Berlin, in their own words:
It was a rainy afternoon in Berlin and our last chance to do The Berlin Balloon Project since Luca (one of the co-founders of The Balloon Project) was leaving the next day. We strapped more than 30 helium balloons to a video camera and sent it up all by itself over the city some few hundred meters. We then proceeded to chase it down with bikes as the rain slowly brought it back to earth. Watch "The Chase" to see how it looked from the ground:
You can view the balloons route mapped out: http://www.gmap-pedometer.com/?r=1710353
It is well worth taking a look at http://theballoonproject.org/
