The Krafla Caldera sits between the American and Eurasian tectonic plates on an active volcanic zone twelve feet long and one foot deep. There are three sights of interest in the area: Krafla Power Plant, Leirhnjúkur Lava Field, and Viti Crater. Located in Myvatn on the other side of the Ring Road from Námaskarð.
Leirhnjúkur is a place of historic lava flow. From the Myvatn fires in 1724-1729 and Krafla fires of 1975-1984 this land has been transformed it into an otherworldly scene. To fully explore the Leirhnjukur Lava Fields hike the gentle three-mile loop gaining 200 feet of elevation around this unique geothermal site.
Right away the bubbly panorama will cue you in to the fact that this is a special place.
A plover hunted well camouflaged in the golden grass right beside the parking lot.
Just a short walk from the lot is the namesake Leirhnjúkur, which translates to Clay Hill.
It is a rhyolite formation which became very porous from exposure to high heat.
There is a nice boardwalk which leads up to an exciting area geothermal area, most other portions of the trail are on jagged lava.
Without a doubt the most eye catching attraction along the route is the aqua hot spring contrasting against the pink ground.
Also there are a number of bubbling mud pots oozing right beside it.
An additional hot spring is almost a geometrically perfect rectangle, like an inviting pool.
From here on out the landscape changes suddenly and most drastically.
The ominous lava field continues to steam, even though the last eruption was over thirty years ago.
Further past the most recent lava flow you can identify the 18th century incident because it is covered in moss.
Vegetation from Vesuvius snow lichen to thyme grows in the region adding a flair of color softening the scene. If you are looking to extend your hike trails lead out to Hverfjall Crater and Dimmuborgir.
Fun Fact: The Apollo 11 crew came to the lava field to train for their moonwalks.