Desert Rainbow, Australia, 2007 Photograph by Randy Olson

A rainbow spreads over a desert town in northwest Queensland, Australia, after a monsoon soaking. Every year, a climatological flip-flop draws the rainy-season weather down from India and douses this bone-dry land in a phenomenon known locally as "the wet."

(Photo shot on assignment for, but not published in, "The Wet Down Under," November 2004, National Geographic magazine)

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