iceland landscape hveravellir geothermal area, area of fumaroles, and multicoloured hot pools, iceland

area beautiful blue boil contrast cracked crater dangerous dramatic european extreme terrain fumarole gas geography geothermal energy geyser heat hole hot spring hveravellir nature reserve iceland icelandic isolation kjolur leisure mud multicolored power scandinavia silica sky smell smoke soil solfatare steam stinking strange sulfur surface thermal vent volcanic volcano water