The Top Five Supercomputers, Illustrated (datacenterknowledge.com)

The Top500 list is progressively less relevant, as none of the large warehouse-scale computers are on it, because their size is secret.

This article is from last year. It misses pictures of the new #2 supercomputer, Nebulae. They are very hard to find, but I did find some:

http://blog.zorinaq.com/?e=18