Aye, Kerlingarfjöll is correct. Of course, it's pronounced nothing like it appears - the double 'l' sounds a bit like a soft 'd'. And the single 'l' sounds like a hard 'd'.
Unless you're a native speaker, I'd advise other readers to take this with a grain of salt.
Also take what I'm writing below with a grain of salt.
According to a Norwegian-Icelandic pronunciation guide, the above pronunciation isn't correct,
but I can understand how it might seem correct when you don't have dialects with similar consonant sounds yourself.
The single 'l' might be what we in Norwegian call a "thick l". The double 'l' would be pronounced very similarly to "dl". These pronuncitations are still in use in Norwegian dialects, though not in any school Norwegian.
But of course, my Icelandic is virtually nonexistent too, and pronunciation guides can be sketchy even when two languages share the same roots.
Great image. When I was there in early July I was trying to get a composition that included the steam in that valley but wasn't quite as successful. You can see my attempt here: http://www.petercox.ie/gallery/145
One of my favourite images from that trip is: http://www.petercox.ie/gallery/143
Don't berate yourself so much. These three images all have much going for them, and I even like the last one better (only detriment is the too monotonous white area in the upper right, similar in effect to the perhaps too prominent white-gray patches of fog in Michael's). But I guess that all of these would look much better printed large than in a small web image.
It's funny to see Michaels great images and be able to recognize exactly where it was taken from for once!
I can imagine!