It's actually a shipping container packed with computers and about 5 petabytes of storage. The Bing Map team processes its maps and redestributes them to other datacenters using this datacenter.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/35034363287@N01">Robert Scoble</a> from Half Moon Bay, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/scobleizer/4870003098/">Microsoft Bing Maps' datacenter</a>