Discover the mysterious Lofthellir Ice Cave from Lake Myvatn on a half-day private tour

Hverfjall (also known as Hverfell) is a tephra cone or tuff ring volcano in northern Iceland, to the east of Mývatn. It erupted in 2500 BP in the southern part of the Krafla fissure swarm. The crater is approximately 1 km in diameter.

Mývatn is a shallow lake situated in an area of active volcanism in the north of Iceland, not far from Krafla volcano. It has a high amount of biological activity. The lake and the surrounding wetlands provide a habitat for a number of waterbirds, especially ducks. The lake was created by a large basaltic lava eruption 2300 years ago, and the surrounding landscape is dominated by volcanic landforms, including lava pillars and rootless vents (pseudocraters). The effluent river Laxá is known for its rich fishing for brown trout and Atlantic salmon. The name of the lake (Icelandic mý ("mosquito") and vatn ("lake"); mosquito lake) comes from the large numbers of mosquitos present in the summer. The name Mývatn is sometimes used not only for the lake but the whole surrounding inhabited area. The River Laxá, Lake Mývatn and the surrounding wetlands are protected as a nature reserve (the Mývatn-Laxá Nature Conservation Area, which occupies 4,400 km2 (440,000 ha).

Lofthellir, a 3500-year-old lava cave, is located in the northeastern part of Iceland near Lake Myvatn. It is about 370 meters long.

The prominent crater row of Lúdentarborgir takes its name from the Lúdent ash ring. It is 15 km long and includes the craters of Grænavatnsbruni which are of the same age, although they have shifted 5 km to the west. The main crater row, which erupted 2300 years ago, extends south from Seljahjallagil to Námafjall in the north. The lava covered most of Lake Mývatn and continued down the valleys of Laxárdalur and Aðaldalur.