Ice cave by Einar Runar Sigurdsson
Despite its stunning icy interior, temperatures in this ethereal cave are actually higher than outside.
Photographer Einar Runar Sigurdsson was warmed by the sun's rays, which crept into the cave on one of Europe's biggest glaciers, while he even lit a fire inside.
Meanwhile, with temperatures above freezing he was able to take pictures of a cascading waterfall.
Icicles in the caves ranged in size, with Mr Sigurdsson snapping one icicle measuring 1.5 metres (4ft 9ins) long.
© Einar Runar Sigurdsson/Solent News & Photo Agency
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