Climbers hang upside down as they climb a giant frozen waterfall. The towering Helmcken Falls in British Columbia, Canada has been dubbed the world's hardest climb and stand at 450ft tall. But despite freezing ice spray, Brit climber Tim Emmett, Raphael Slawinski, from Canada, and Klemen Premrl, from Slovenia, conquered the notorious ice climb. (Photo by Wiktor Skupinski/Barcroft Media)
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