This may be one of my favorite photos that I've ever taken. It's straight out of my iPhone 5s, using the built-in camera app without any filters or post-processing.

I took this photo as I was leaving the peak, and love the way Mawenzi (one of three peaks of Kilimanjaro) pokes above the clouds in the distance with the sun almost directly above it.

I'm not certain, but I think the thin atmosphere may have affected the light in this photo -- in a pretty cool way.