A massive active volcanic caldera north of Lake Mývatn. Home to the iconic turquoise-filled Víti explosion crater and the steaming Leirhnjúkur lava field.
Story & Legend
The name means Hell. Opened by the "Mývatn Fires" in 1724, blasting mud for 5 years. Nearby Leirhnjúkur is a surreal landscape formed by the "Krafla Fires" eruptions (1975-1984), where you can walk through still-steaming lava fields that feel like another planet.
Geology & Science
One of the most active volcanic systems in Iceland. The crust is only 2km thick here. The Krafla caldera is about 10km in diameter and contains the geothermal power station that harnesses the immense underground heat.
Safety
Rim walk around Víti can be slippery with sticky mud. At Leirhnjúkur, stay strictly on the marked paths. The light-colored ground is often a thin crust over boiling mud pots.
Photo Tip
Electric blue water contrasts with the scorched brown earth. The Leirhnjúkur lava fields offer dramatic steam vents against dark volcanic rock.
Insider Tip
Don't just look at the Víti crater lake. Walk the Leirhnjúkur trail nearby to see steaming, still-warm lava fields from the 1980s eruptions. It feels like walking on Mars.
Best Time to Visit
Summer or early Autumn. The road to Krafla is often impassable or officially closed during winter due to heavy snow and ice.
What to Bring
Sturdy hiking boots with thick soles. The ground in the Leirhnjúkur lava field can literally be hot to the touch, and the rocks are razor-sharp.
