Photographer Connie Zhou has this wonderful gallery of photographs from inside Google's data centres -- the're incredibly colourful, clean and elegant places. Google also has their own gallery which provides descriptions of each photo. From the one you see above:
These colorful pipes are responsible for carrying water in and out of our Oregon data center. The blue pipes supply cold water and the red pipes return the warm water back to be cooled.
Permission to post the above photo was kindly granted by Connie.