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Sunset at Wind Cave National Park, Custer, South Dakota

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Pink stormy sky with lightning, Martin, South Dakota

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Tour boat near watefalls, Iguazu National Park, Argentina

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Rainbow created by waterfalls, Iguacu National Park, Brazil

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Andean Condor returning to the roost at La Buitreras, San Carlos de Bariloche, Argentina

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Andean Condor returning to the roost at La Buitreras, San Carlos de Bariloche, Argentina

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Rock formations of La Buitreras and Andean cordillera beyond, San Carlos de Bariloche, Argentina

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Payún Matru shield volcano, Reserva Provincial La Payunia, Malargüe, Argentina

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Mist created by waterfalls over Atlantic Rainforest, Iguazu National Park, Argentina