Surtshellir lava tunnels (caves) in the Hallmundarhraun lava field, Western Iceland

- Image ID: GNRKCW
Luis Leamus / Alamy Stock Photo
Image ID: GNRKCW
Surtshellir lava tunnels (caves) in the Hallmundarhraun lava field, formed by a volcano eruption in the Langjokull glacier area around the year 930 AD, Western Iceland