VIDEO: Explore Google Data Center From Inside
Watch the video which demonstrates how Google maintains, stores and destroys the data about you.
If you want to view the Data center for yourself, well no need to go out of your house all you have to do is visit his Google street view link http://www.google.com/about/datacenters/inside/streetview/
I was very fascinated how Google cruses the Harddisk which stops working and your data is backed up 3 times and that too for free. What more do you want?