Perspective, by Trey Watkins, Martin Reinfried, Dennise Lite, Amy Lee & Cameron Brown - see www.onemandown.com/Perspective.htm
See other photos here: www.flickr.com/photos/13718600@N02/favorites/
Enormous replicas of children's letter blocks are spaced around the playa, arranged in such a way that if viewed from the proper perspective they will all line up and appear to be the same size. From this one spot you will be able to read the message of the cubes.
The message changed at Sunset for four consecutive days. The four messages were:
Earth At Risk (Wednesday)
Green the Man (Thursday)
Where Are You (Friday & Saturday)
Photo taken at the Burning Man 2007 festival (Black Rock Desert, Nevada).