Hverfjall Crater
About the place
Hverfjall (also written Hverfell) is one of the largest tuff rings on Earth, formed by a single explosive eruption of steam and ash about 2,500 years ago. The crater is roughly a kilometre wide — a dark rim of black scoria over the green Mývatn basin. Two marked paths climb the loose cinder to the top, where a rim loop opens onto the lake, the Dimmuborgir lava field and, on a clear day, the flat-topped shield of Herðubreið. Climbing is free; the car park at the foot is usually charged.
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