After leaving Hverfjall, we continued north toward the Krafla volcanic area. The drive passed through a landscape shaped by repeated eruptions, with extensive lava fields and sparse vegetation covering much of the terrain. Our first stop was the panoramic viewpoint near the Krafla power station operated by Landsvirkjun. From here, the scale of the geothermal field was easy to appreciate. Steam rose from numerous vents scattered across the hillsides, evidence of the intense heat that remains close to the surface. The power station harnesses this geothermal energy by extracting steam and hot water from deep wells to generate electricity, making the area an important example of Iceland’s use of renewable energy resources.

From the viewpoint, we headed to Leirhnjúkur and followed the marked trail across one of the most geologically active landscapes in the country. The route crossed young lava fields created during the Krafla Fires, a series of volcanic events that occurred between 1975 and 1984. The lava remains largely barren, with jagged black surfaces, pressure ridges, and fissures showing how recently it was emplaced. In several places, steam escaped through cracks in the ground, and the smell of sulfur was noticeable in the air.

The trail continued through areas of colorful geothermal activity. Patches of yellow sulfur deposits, red-stained earth, and gray clay contrasted sharply with the dark lava. The ground here is heated by volcanic gases and hot fluids circulating beneath the surface. Although no eruption is currently taking place, the landscape gives a clear impression that volcanic processes remain active below.

Later, we explored the Krafla caldera itself. The caldera is a large volcanic depression formed by repeated eruptions and subsidence over thousands of years. Near its center lies the crater lake Víti, whose blue water fills an explosion crater created during an eruption in 1724. Standing near the rim provided a view of both the lake and the surrounding volcanic terrain, highlighting the variety of geological features concentrated within a relatively small area.

By the end of the hike, Krafla and Leirhnjúkur had offered a different perspective from Hverfjall earlier in the day. While Hverfjall preserves the shape of a single ancient eruption, Krafla presents an active volcanic system where geothermal activity, recent lava flows, tectonic rifting, and volcanic processes can all be observed in the same landscape.