If you think rock climbing in the Alps would be challenging, how about climbing an iced waterfall. Really? Contributor Enrico Pescantini used a drone to film a climber scaling the Cascata di Cambrembo waterfall, one of Italy's largest, in its frozen state during the depths of winter. The waterfall is located in the Italian Alps in Italy's Lombardy region. Despite its copious water flow, during the frigid winter months it completely freezes, allowing it to be scaled like a rock cliff.