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World Migratory Bird Day
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Castle Square, Old Town, Warsaw, Poland
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A time-worn medieval marvel
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Tolkien Reading Day
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Racing through the five boroughs
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Skipper butterfly on an Echinacea flower
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Among the cedar and spruce
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Lime Kiln Lighthouse on San Juan Island, Washington state
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Blue hues and ceramic scenes of Porto
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Horseshoe Falls illuminated at night in Niagara Falls, Ontario
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Happy Holi!
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Vancouver Coastal Sea wolves in the Great Bear Rainforest
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Arch and Milky Way, Alabama Hills, Sierra Nevada, California, USA
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Sports where you least expect it
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Japan Castle Day
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Grand Prismatic Spring at Yellowstone National Park, Wyoming, USA
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Marseille welcomes to Olympic torch
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A delightfully ornate Easter display
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Christmas Bird Count turns 125
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Common raven
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Sunlight turning silver to gold
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Im ready for my close-up, Mr. DeSquirrel
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Kinder Scout, Peak District National Park, UK
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Merry Christmas!
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Aerial view of the ruins of Sacsayhuamán, Cusco, Peru
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Burns Night in Scotland
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40 years of recovery
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Star Wars Day
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Þorrablót, Icelandic midwinter festival
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Thousand Islands region, St. Lawrence River, USA-Canada border