Video: Cool climbing: meet the men who scale giant icebergs "From the start," says Klemen Premrl, "I always wanted to climb icebergs. But no one really climbs them. It's impossible to know how they will react; are they going to crash, roll or whatever? Premrl is a climber with a difference. He specialises in climbing mountains made entirely of frozen water, and has long dreamt of reaching the summit of one of these terrifying glacial shards, which can reach over 100 metres in height. Last week, Premrl published footage of an extraordinary expedition undertaken with fellow Slovenian ice climber Aljaz Anderle, which shows the pair attempting to scale icebergs in Greenland's stunning Disko Bay. Their first attempts are aborted as the icebergs shift and collapse around them, before finally the pair achieve their aim. Premrl is well aware that iceberg climbing brings with it enormous risks. "Icebergs are clearly unpredictable, [but] I cannot recognise true danger," he says in a full-length version of the video above, which was shot on a GoPro camera, and published on YouTube as part of GoPro's "HERO4: The Adventure of Life in 4K" series. I am realising that there is no longevity for climbers that climb icebergs. Nor for icebergs. Accepting some kind of risk is necessary. Klemen Premrl and Aljaz Anderle on the summit of a giant iceberg in Greenland (Photo: GoPro/YouTube)