At the Google office building in Mountain View, California. There are more if you turn around.
Link (thanks Oliver)
Similar Street View images
Two in One: Google cars facing the rain and Google testing its new compact camera
Four google cars and the obelisco
Look there are 6 cars Google Street View
25 Google cars
The ‘thinnest building’ of Maringá
New google camera
Old VS. New
Google takes photo of itself
Six wheeled cars are popular in Los Angeles
2 google maps street view cars taking photos of eachother
Whoever did this, I made a copy.