From Humanist I found Simon Norfolk’s web site which includes a photographic series on “The Supercomputers: ‘I’m sorry Dave, I’m afraid I can’t do that” (click enter, then click the title of the collection and then click photographs.)
The photographs pick out details of HPC installations that are visually arresting. They are without people as if these spaces were silent. In reality when you are in these spaces (at least the computer rooms I’ve been in) they are noisy with cooling systems and there are people nursing the beasts.