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Nazca boobies, Wolf Island, Galápagos Islands, Ecuador
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Carlsbad Caverns National Park, New Mexico, USA
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The Sonoran Desert, Arizona, USA
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Park of the Monsters
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Hangin around
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Bisti/De-Na-Zin Wilderness, New Mexico, USA
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Bridging past and present
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Kinder Scout, Peak District National Park, UK
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Cascade in the City of Waterfalls
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Trunks packed for road
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Squirrel Appreciation Day
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Maritime forest in Cumberland Island National Seashore, Georgia, United States
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Sequoias of the sea
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Dusky eagle-owls, Pakistan
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Vineyards above the Moselle River, Rhineland-Palatinate, Germany
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Fogo Island, Newfoundland and Labrador
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Pinnacles National Park, California, United States
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Where two continents meet
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A delightful day for donkeys
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Happy World Whale Day!
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Dad on duty
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Happy Canada Day!
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Wheatear, Peak District National Park, England
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Madame Sherri Forest, New Hampshire, United States
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Striated heron on a Victoria water lily, Pantanal, Brazil
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Cinque Torri, Dolomites, Italy
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Nature, art, and...math?
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Celebrating art in the city
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Vasco da Gama Bridge, Lisbon, Portugal
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American Red Cross pioneers