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National Park Berchtesgaden - Germany |
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Niwot Ridge - United States of America |
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Oberes Stubachtal - Austria |
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Obergurgl - Austria |
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Ödenwinkelkees - Austria |
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Ordesa y Monte Perdido / Huesca ES - Spain |
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Ovre Heimdalsvatn - Norway |
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OZCAR-RI Draix-Bleone observatory - France |
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OZCAR-RI Draix-Bleone observatory Draix site - France |
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OZCAR-RI Draix-Bleone observatory Galabre site - France |