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Organ Pipe Cactus #NationalMonument is gorgeous in the
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Organ Pipe Cactus #NationalMonument is gorgeous in the #spring! Located in south #Arizona, Organ Pipe Cactus protects 516 square miles of #SonoranDesert. In the spring, the park's landscape is carpeted in #wildflowers -- like yellow poppies, blue lupine and magenta common owl's clover. Photo courtesy of Ed Cooper (@ed_cooper_photography).(Credit: U.S. Dept. of Interior)

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Amazing Instagram photos of national parks

The Department of the Interior's collection of the most amazing scenes from U.S. national parks on Instagram, a mobile app that can be used to alter the color and tone of photographs.