Rockefeller Center Xmas Tree '06
The massive images of snowflakes on the sky scraper moved slowly over the entire building and would stop and fade near the top of the (probably 12+ story) tall tree.
'06 Xmas tree in Rockefeller Center, NYC
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A shot I took of last year's tree (also about to be used in a turkish publication :) : flickr.com/photos/badison/78098043/
More info: www.wnbc.com/christmastree/index.html