Here’s the thing about climbing an iceberg – it’s impossible to know how it will react. Will it hold, or crash and roll is a question few professional ice climbers set out to find the answer to.

Which makes Klemen Premrl and Aljaz Anderle two very daring risk-takers indeed. The two Slovenian alpinists rose to the challenge and took to the Arctic waters of Greenland’s Disko Bay in search of the ultimate iceberg to summit. This video, taken from GoPro, captures their climb to the top.