With Google's release of an Insider's look of its data centers, I was curious what Google Image Search shows for Google, Facebook, Apple, Microsoft, Amazon.
The below are top 20 images from searching for "<company name> data center"
Some have made the point that Google's image publication was a PR move. One thing that did work well from a PR move is most of the top 20 images are from what was published yesterday. You can make your own conclusions from looking at the images. Note: the amazon pictures are many times not amazon facilities, but images that are embedded on a page where Amazon is mentioned.
I included the links to image searches if you want to get to the original source of the images