Tourists scramble to avoid wave caused by a glacier collapse

Stephan Mantler, a mountain guide and owner of Icelandic tour company Hafjall, captured the whole ordeal on camera. Tourists were admiring the Breiðamerkurjökull glacier in Vatnajökull National Park in southeastern Iceland. This area is only accessible with a trained mountaineer, according to Mantler.

Mantler said he could hear the cracking from the far-off glacier, which is a sign that a glacier calving — the natural process in which a large section of ice breaks away — was imminent. With his client safe, he pulled out his phone and started recording, but kept his eye on the other group of tourists below.