Athabasca Glacier

 The Athabasca Glacier is one of the six principal 'toes' of the Columbia Ice field, located in the Canadian Rockies. The glacier currently recedes at a rate of 2-3 meters per year and has receded more than 1.5 km in the past 125 years and lost over half of its volume. The glacier moves down from the ice field at a rate of several centimeters per day. Due to its close proximity to the Ice fields Parkway, between the Alberta towns of Banff and Jasper, and rather easy accessibility, it is the most visited glacier in North America. The leading edge of the glacier is within easy walking distance; however, travel onto the glacier is not recommended unless properly equipped. Hidden crevasses have led to the deaths of unprepared tourists.

http://en.wikipedia.org/wiki/Athabasca_Glacier 

One of the crevasses in the glacier


(Below)
Columbia Ice field "Ice Explorers" take passengers around the Glacier
http://www.explorerockies.com/columbia-icefield/