Krafla is a caldera which has had volcanic activity as recently as 1984. It essentially looks like a dirt mountain, but it has some amazing craters.
It is also a source of geothermal energy with a power station nearby and to my surprise it’s also very noisy due to a steam vent being opened there. It’s like hearing a jet engine the whole time and a bit unsettling to think of all that power under your feet.
It was well worth the detour – a truly isolated place that is both beautiful and scary. It would get pretty horrible in bad weather as it’s so exposed.
Finally, our Icelandair plane over was named after Krafla so it was fun to have gone and seen it – much more accessible than some of the big volcanoes the other planes are named after!