Ключевые слова: boil, brown, caldera, clouds, crater, energy, erupting, field, fumarole, gas, geology, geothermal, heat, hot, iceland, krafla, landscape, lava, mineral, mountain, mud, nature, orange, outdoors, power, pressure, rock, scenery, scenic, sky, smell, smoke, steam, steaming, sulfur, thermal, vapor, volcano,