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Walruses in Svalbard, Norway
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Great wildebeest migration at Mara River, Kenya
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Lighting up the Badlands
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A salty situation
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The other great barrier reef
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Protecting the gentle giants
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A day for cousins of every stripe
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Ring of Brodgar, Orkney, Scotland
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Dubrovnik, Croatia
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Sequoias of the sea
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Mosque-Cathedral of Córdoba, Andalusia, Spain
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Mount Assiniboine Provincial Park, British Columbia, Canada
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Thousand Islands region, St Lawrence River, USA-Canada border
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A record-breaking reign
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Castle in the sky
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Home of racing legends
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Christmas Bird Count turns 125
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National Park Service anniversary
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Frosty Finland
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Spiralling upward...
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European hedgehog
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A legendary islet
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Þorrablót, Icelandic midwinter festival
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Independence Day of the Argentine Republic
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Green sea turtle
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Great horned owl
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Christmas market, St Stephens Basilica, Budapest, Hungary
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Lake Magadi, Kenya
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Walking a rocky rainbow
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The Shard, London