This are some photos of the area I consider one of the most fascinating in Iceland!
[will be away some days....... will come back asap] Hugs
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Hverfjall , also known as Hverfell [ˈkʰvɛrˌfɛtl̥]) is a tephra cone or tuff ring volcano in northern Iceland, to the east of Mývatn.

It erupted in 2500 BP in the southern part of the Krafla fissure swarm.[1] The crater is approximately 1 km in diameter.[2]