September 2, 2014

Bob Marshall Wilderness, Montana

Photograph by Prisma Bildagentur, Alamy

A huge escarpment called the Chinese Wall ripples across the landscape of the Bob Marshall Wilderness Area in Montana. In a 1985 National Geographic article, senior writer Mike Edwards said: "It does not look like China's wall, except that it crowns all and is gray rock, mostly limestone. To my eye it is a juggernaut of a tidal wave, surging out of the west, lifting its crest a thousand feet."

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