Hverfjall (Hverfell)

Hverfjall (Hverfell) is a well-known volcanic tephra cone / tuff ring in the Lake Mývatn region of northern Iceland. Geological sources and regional guides describe it as part of the Myvatn volcanic history (the Hverfjall cycle) and attribute its formation to a large, brief eruption roughly 2,500 years ago that produced the pronounced cone and crater visible today. The crater is a conspicuous landmark visible from the shore of Mývatn and is frequently cited in travel and hiking guides as a destination; guides describe a rim hike and recreational visitation. The supplied sources contain no accounts of paranormal phenomena, named spirits, or folkloric entities associated with Hverfjall. Cultural references in the material are secular and artistic: the crater has been the site of at least one field recording (a 2012 recording by Francisco López) and appears as an inspiration or title in contemporary music/record lists. Explanatory frameworks in the sources are geological and recreational rather than supernatural. Access appears to be open to visitors and the crater functions primarily as a geological landmark and hiking destination in regional tourism materials. The spelling variant Hverfjall / Hverfell is noted across sources but refers to the same feature.