Volcanic Skies (Please click for larger view)

No saturation applied. I just loved how the streaks looked like molten

lava.

Three things:

1) The sky makes a very strong appeal and the red-pinkish effect is interesting.

2) This very effect makes it look manipulated along with the very contrasted sky. It is good you say saturation wasn't boosted.

3) I think the town on the bottom competes (and clashes) as a subject from the sky, and would crop it out.