One of the three craters (next to Rauðbrók and Smábrók) of the same seven-kilometer eruption crevice, formed around 3,400 years ago. Located in West Iceland. Before I went there for the first time, I drove by him many times and always looked at him mesmerized. Regular shape, eye-catching black color. The view from Grábrók to his smaller siblings took my breath away. So is the surroundings.
That day, when I was recording the sound under the crater, there was a very strong wind. At times it was difficult to stand with the gusts. Craters tend to be very windy, possibly because they are often solitary elevations in the middle of a flat lava field.