COLUMBIA ICEFIELDS, CANADA-AUGUST 21: Massive Ice Explorers, specially designed for glacial travel, take tourists onto the surface of the Athabasca Glacier (located int he Canadian Rockies) on August 21, 2011 in the Columbia Icefields, Canada.
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COLUMBIA ICEFIELDS, CANADA-AUGUST 21: Massive Ice Explorers, specially designed for glacial travel, take tourists onto the surface of the Athabasca Glacier (located int he Canadian Rockies) on August 21, 2011 in the Columbia Icefields, Canada.