ICE FORMATION photos : Alaska Stock Images

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Wide angle view of a sow Polar bear with paw outstretched on the pack ice along the coast in morning, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, autumn

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Fractured surface ice drifted to the shoreline of Mendenhall Lake, Juneau, Southeast Alaska, Winter

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Male and female Inupiaq Eskimo hunters wearing their Eskimo parka's (Atigi) carry a rifle and walking stick while looking out over the Chukchi Sea, Barrow, Arctic Alaska, Summer

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Male Inupiaq Eskimo hunter wearing his Eskimo parka (Atigi) and carrying a walking stick while looking out over the Chukchi Sea, Barrow, Arctic Alaska, Summer

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Male and female Inupiaq Eskimo hunters wearing their Eskimo parka's (Atigi) carry a rifle and walking stick while looking out over the Chukchi Sea, Barrow, Arctic Alaska, Summer

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Male Inupiaq Eskimo hunter wearing his Eskimo parka (Atigi) and carrying a walking stick while looking out over the Chukchi Sea, Barrow, Arctic Alaska, Summer

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Huge iceberg with hole, LeConte Bay, Southeast, Alaska.

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Blue ice formation on Knik Glacier in winter, Southcentral Alaska, USA

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Man standing in a circular formation (ice tube) on Knik Glacier, Southcentral Alaska, USA

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Man skiing near frozen icebergs in winter, Knik Glacier, Southcentral Alaska, USA

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The view from behind a frozen waterfall along One Mile Creek in the Alaska Range.

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The view behind a frozen waterfall along One Mile Creek off the Richarson Highway in the Alaska Range.

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A wave-like formation of snow curls around the entrance of a small ice cave in the moraine of Black Rapids Glacier in winter; Alaska, United States of America

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A man walks beneath a large ice arch formation detached from the main body of Black Rapids Glacier in winter, Interior Alaska, USA

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A man on a split board views a large wall of ice at the Canwell Glacier, Interior Alaska, USA

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An arch formation in the ice of Black Rapids Glacier frames adjacent mountains in the Alaska Range; Alaska, United States of America

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A family explores a small crevasse in Worthington Glacier near Thompson Pass; Alaska, United States of America

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Man stands inside an ice tunnel under the Black Rapids Glacier, Alaska Range, Interior Alaska, USA

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A man explores a dark tunnel beneath the ice of Canwell Glacier in the Alaska Range.

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Ice climber viewing Worthington Glacier, Southcentral Alaska, USA

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Daylight shines into a tunnel carved into the ice of Black Rapids Glacier by a melt water stream; Alaska, United States of America

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A young woman stands next to a giant wall of glacier ice in the winter, Castner Glacier, Alaska Range; Alaska, United States of America

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A man breaks for lunch beneath the ice of Canwell Glacier in the Alaska Range, Interior Alaska, USA

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A man standing inside a lengthy tunnel within the ice of Canwell Glacier in the Alaska Range.

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Ice climber on Worthington Glacier, Southcentral Alaska, USA

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Exit Glacier surrounded by autumn coloured foliage, South-central Alaska near Seward; Alaska, United States of America

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Sunlight reflects off of and penetrates through the ice of Black Rapids Glacier; Alaska, United States of America

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A young woman observes the exposed ice of Castner Glacier in the Alaska Range in winter; Alaska, United States of America

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A man enters a cave within Canwell Glacier in the Alaska Range in winter, Interior Alaska, USA

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A man stands inside a massive ice cave within Castner Glacier in the Alaska Range in the summer, Interior Alaska, USA