Fearless daredevils risk a frosty ending - using their ice-cool nerves to scale these icy walls, where just one mistake could cause the ice to shatter and collapse. The breathtaking routes, found in the Canadian Rockies, were tackled by Jen Olson, Jon Walsh and Magda Kosior, who braved treacherous conditions to explore the spectacular structures. Each climb takes four to six hours, with the trio maintaining intense concentration to avoid the dangers in front of them. A small lapse could leave them vulnerable to falling ice, slashing their ropes with their own climbing axes and spikes, changes in weather and even avalanches. [Photo/icpress.cn]