Hanne & Jens Eriksen / Fumarole in the Krafla volcano area, Iceland, June 2009
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Peter Cairns / Castle Geyser erupting at dawn, Old Faithful geothermal area, Yelowstone National Park, Wyoming, USA, September 2008
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Peter Cairns / Parched trees in front of Grand Prismatic Spring geothermal area, Yelowstone National Park, Wyoming, USA, September 2008
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Juan Carlos Munoz / Eyjafjallajkull volcano erupting, Fimmvruhls area, Iceland, 7th of April 2010
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Juan Carlos Munoz / Eyjafjallajkull volcano erupting, Fimmvruhls area, Iceland, 7th of April 2010
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Juan Carlos Munoz / Eyjafjallajökull volcano erupting, Fimmvörðuháls area, Iceland, 7th of April 2010
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Juan Carlos Munoz / Eyjafjallajökull volcano erupting, Fimmvörðuháls area, Iceland, 7th of April 2010
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Juan Carlos Munoz / Eyjafjallajkull volcano erupting, Fimmvruhls area, Iceland, 5th of April 2010
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Juan Carlos Munoz / Eyjafjallajökull volcano erupting, Fimmvörðuháls area, Iceland, 7th of April 2010
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 6/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 2/11. July 2008
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Jouan & Rius / Pipes carrying heated water from the geothermal power plant in Krafla volcano area, northern Iceland 2005
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Orsolya Haarberg / Acidic steam and solidified lava surface at Leirhnjkur. Iceland. July 2008
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Orsolya Haarberg / Steam vents and sulphur deposit at Hverir. Nmafjall, Iceland. June 2008
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Orsolya Haarberg / Rhiolite mountains at Landmannalaugar. Rhyiolite volcanism. Iceland. June 2008
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Orsolya Haarberg / Steam vent at Hverir. Nmafjall, Iceland. June 2008
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Christophe Courteau / Boiling mud pool Rotorua volcanic area North Is New Zealand
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Orsolya Haarberg / View over the hot spring area west of Hrafntinnusker. Fjallabak Nature Reserve, Iceland.
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Orsolya Haarberg / View over the hot spring area west of Hrafntinnusker. Fjallabak Nature Reserve, Iceland, August 2010
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Hanne & Jens Eriksen / Boiling mud pool in the Krafla volcano area, Iceland, June 2009
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Hanne & Jens Eriksen / Boiling mud pool in the Krafla volcano area, Iceland, June 2009
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Hanne & Jens Eriksen / Boiling mud pool in the Krafla volcano area, Iceland, June 2009
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Ernie Janes / Geothermal area, Wai-O-Tapu, North Island, New Zealand, January 2009
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Ernie Janes / Champagne Pool, Wai-O-Tapu geothermal area, North Island, New Zealand, January 2009
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Ernie Janes / Geothermal area, Wai-O-Tapu, North Island, New Zealand, January 2009
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Peter Cairns / Stream running through bleached Cottonwood trees in geothermal area, Yelowstone National Park, Wyoming, USA, September 2008
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Peter Cairns / Photographer lined up on boardwalk to photograph Castle Geyser at Old Faithful geothermal area, dawn, Yellowstone National Park, Wyoming, USA, September 2008
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Peter Cairns / Photographers lined up on boardwalk to photograph Castle Geyser at Old Faithful geothermal area, dawn, Yellowstone National Park, Wyoming, USA, September 2008
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Peter Cairns / Abstract of trunks of bleached cottonwood trees in geothermal area, Yelowstone National Park, Wyoming, USA
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Peter Cairns / Tourists on boardwalk in Grand Prismatic Spring geothermal area, Yellowstone National Park, Wyoming, USA, September 2008
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Kirkendall-Spring / Winter landscape in the Lower Terrace area of Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, February 2011
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Kirkendall-Spring / Warm water falling over rocks in the Palette Spring section of the Lower Terrace area, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, January
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Kirkendall-Spring / Winter landscape in the Lower Terrace area of Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, February 2011
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Kirkendall-Spring / Winter landscape in the Lower Terrace area of Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, February 2011
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Kirkendall-Spring / Winter landscape in the Geyser Hill area withOld Faithful erupting in the background, Yellowstone National Park, Wyoming, USA, February 2011
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Kirkendall-Spring / Winter landscape in the Geyser Hill area of Old Faithful, Yellowstone National Park, Wyoming, USA, February 2011
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Jeff Vanuga / Thermal pools and hot springs along White Creek in the Lower Geyser Baisn area of Yellowstone National Park, Wyoming. June 2010.
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Jeff Vanuga / Thermal pools and hot springs along White Creek in the Lower Geyser Basin area of Yellowstone National Park, Wyoming. June 2010.
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Sergey Gorshkov / Kamchatka Brown bear (Ursus arctos beringianus) bathing in water pool beside area of geothermal activity, Kamchatka, Far east Russia, January 2005
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Orsolya Haarberg / View over the hot spring area between Hrafntinnusker and Haskerdingur, Fjallabak Nature Reserve, Iceland, August 2010
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Orsolya Haarberg / View over the hot spring area between Hrafntinnusker and Haskerdingur, Fjallabak Nature Reserve, Iceland, August 2010
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Orsolya Haarberg / View over the hot spring area west of Hrafntinnusker, Fjallabak Nature Reserve, Iceland, August 2010
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Wild Wonders of Europe / Carwardine / Aerial view of Namafjall, geothermal area near Lake Myvatn, Northern Iceland, June 2009
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Wild Wonders of Europe / Carwardine / Aerial view of Namafjall, geothermal area near Lake Myvatn, Northern Iceland, June 2009
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Wild Wonders of Europe / Carwardine / Aerial view of tourists at Namafjall, geothermal area near Lake Myvatn, Northern Iceland, June 2009
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Wild Wonders of Europe / Bergmann / Namafjall, a geothermal area, Myvatn, Thingeyjarsyslur, Iceland, July 2009
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Wild Wonders of Europe / Bergmann / Namafjall, a geothermal area at sunrise, Myvatn, Thingeyjarsyslur, Iceland, July 2009
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Jeff Vanuga / Steve Fuller photographing in the West Nymph Lake Creek Geyser area, Yellowstone National Park, Wyoming, USA, October 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 8/11. July 2008
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Inaki Relanzon / The Strokkur about to erupt, the biggest geyser active in the Geysir area, SW Iceland. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 10/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 1/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland. Sequence 2/2. July 2008
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Inaki Relanzon / Hotsprings in the Geysir area, SW Iceland. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 5/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 3/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 9/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 7/11. July 2008
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Inaki Relanzon / Hotsprings in the Geysir area, SW Iceland. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 11/11. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland. Sequence 1/2. July 2008
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Inaki Relanzon / Tourists watching eruption of The Strokkur, the biggest geyser active in the Geysir area, SW Iceland, sequence 4/11. July 2008
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Jouan & Rius / Bubbling hot mud springs, geothermal area of Krafla, North Iceland 2005
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Jouan & Rius / Fumaroles in the Krafla volcano area, Northern Iceland 2005
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Jouan & Rius / Boiling mud pool, geothermal area of Krafla, North Iceland 2005
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Orsolya Haarberg / Steam vent at Hverir. Námafjall, Iceland. June 2008
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Orsolya Haarberg / Rhiolite mountains at Landmannalaugar. Rhyiolite volcanism. Iceland. June 2008
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Orsolya Haarberg / Spouting hot spring. Strokkur. Iceland. June 2008
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Orsolya Haarberg / Boiling mudpool. Hverir, Námafjall, Iceland. July 2008
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Theo Allofs / Mud pot, Waiotapu thermal area, New Zealand
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Inaki Relanzon / Bathers relaxing in The Blue Lagoon, Thermal area and swimming pools on the Reykjanes Peninsula, near Reykjavik, Iceland
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Inaki Relanzon / Bathers relaxing in The Blue Lagoon, Thermal area and swimming pools on the Reykjanes Peninsula, near Reykjavik, Iceland
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Inaki Relanzon / People photographing bubbling hot mud springs, geothermal area of Krafla, North Iceland
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Inaki Relanzon / People photographing bubbling hot mud springs, geothermal area of Krafla, North Iceland
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Inaki Relanzon / Person photographing bubbling hot mud springs, geothermal area of Krafla, North Iceland
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Albert Aanensen / Warbrick Terraces algae and silica ,Wamangu Thermal Area, Rotorua, New Zealand
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TOM MANGELSEN / American Elk (Cervus elaphus) Mammoth area. Yellowstone NP, Wyoming, USA.
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Philippe Clement / Castle geyser spouting, Old Faithful area, Yellowstone NP, Wyoming, USA
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Philippe Clement / Castle geyser spouting, Old Faithful area, Yellowstone National Park, Wyoming, USA
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Philippe Clement / Opalescent pool, Old Faithful area, Yellowstone, Wyoming, USA