Hverir is a large geothermal area near Myvatn. A wasteland full of pools of boiling water and mud and smoking fumaroles, it’s surrounded by red soil. It also has a heavy scent of sulphur, but gives a decent understanding of what powers the whole country: geothermal energy from volcanoes and springs. Evidently, it’s the closest you can get to the feel of Mars on Earth. There is a hiking trail up to Námaskarð pass and Námafjall mountain which winds back to the parking lot.