Hverfjall volcano crater at sunset, Myvatn, Iceland, Polar Regions

Desolate black ash landscape at the foot of Hverfjall (Hverfell) volcano, Myvatn, northern Iceland, Iceland, Polar Regions

Lake Myvatn, bird protected area in autumn, north-west shore of lake, looking eastwards, Hverfjall volcano visible in the distance, Myvatn, north Iceland, Iceland, Polar Regions

Hverfell (Hverfjall) ash crater in north of the country, Myvatyn (Myvatn) Nature Reserve, Iceland

Winter landscape on Volcano Hverfjall, Myvatn, Iceland, Polar Regions

Volcanic ash (tephra) crater Hverfjall (Hverfell), 140m deep, more than 1 km across, at Myvatn, northern Iceland, Iceland, Polar Regions

Lake Myvatn, bird protected area in autumn, north-west shore of lake, looking eastwards, Hverfjall volcano visible in the distance, Myvatn, north Iceland, Iceland, Polar Regions

Panorama image of Hverfjall crater, Iceland, Polar Regions

Hverfjall volcano, Reykjahlid, Iceland, Polar Regions

Riders in front of on partly frozen lake Myvatn, volcanoes, Ludent, Hverfjall, Myvatn, Iceland, Europe

Tent in front of volcanic cone and lava, barren landscape, Vogar, Hverfjall, Myvatn, Iceland, Europe

A young woman dressed in black and wearing boots walks along the ridge of the Hverfjall crater with steam rising in the volcanic background.

A young woman dressed in black and wearing boots walks along the ridge of the Hverfjall crater with Lake Myvatn in the background.

customised Icelandic 4x4 pick up truck parked at the Volcano Hverfjall

The Hverfjall crater, a tephra cone or tuff ring volcano in Northern Iceland. The crater is approximately 1 kilometre in diameter; Skutustadahreppur, Northeastern Region, Iceland