Thanks! I was really surprised when I looked out the window and suddenly could see Iceland so clearly. I understood that Hvannadalshnukur had to be down there somewhere. I'm not really sure what the dark line is, but I took the picture through the window and I don't think it was very clean. I guess it's just a scratch in the window. I have edited the photo in Photoshop to make it better, but the reflections or light to the left is hard to remove. I think you can see the Skaftafell campsite down to the left.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe