Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009
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Inaki Relanzon / Potholer exploring the Graller del Boixaguer cave, Montsec mountains, Pyrenees, Catalonia, Spain, May 2012.
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Chadden Hunter / Stormy conditions outside the entrance to ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009
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Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009
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Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009
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Chadden Hunter / Filming around the extremely delicate ice formations in volcanic ice cave, Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009