Twilight descends on Tanzania’s Mount Kilimanjaro. Although Kilimanjaro is located just 200 miles [322 kilometers] south of the equator, the combination of sun angle, thin atmosphere, and extreme elevation means that its upper slopes experience "summer every day and winter every night."

(Text adapted from and photograph shot on assignment for, but not published in, "Hiking into the African Sky," July/August 1998, National Geographic Traveler magazine)