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832-398110 - Volcanic landscape with colourful hills, pipes of the Krafla geothermal power plant, geothermal area, Northern Iceland, Iceland, Europe
832-398108 - Steaming fumarole, solfatar in the geothermal area Hveraroend, also Hverir or Namaskard, Sun Star, North Iceland, Iceland, Europe
832-397552 - Strokkur geyser, thermal area, Iceland, Europe
832-397551 - Strokkur geyser, thermal area, Iceland, Europe
832-397550 - Strokkur geyser, thermal area, Iceland, Europe
832-397555 - Geyser, thermal area, Iceland, Europe
832-397553 - Strokkur geyser, thermal area, Iceland, Europe
1350-4697 - Strokkur geyser erupting, in the Geysir hot springs area, Haukadalur geothermal area, Southwest Iceland
1350-4951 - Strokkur geyser erupting, in the Geysir hot springs area, Haukadalur geothermal area, Southwest Iceland
832-393486 - Mud bubble, mud pot, high temperature area Namaskaro or Namskard, Namafjall, Myvatn or Myvatn, North Iceland, Iceland, Europe
832-393490 - Boiling mud, splashing mud pot, high-temperature area Namaskaro or Namskard, Namafjall, Myvatn or Myvatn, North Iceland, Iceland, Europe
832-393489 - Boiling mud, high temperature area Namaskaro or Namskard, Namafjall, Myvatn or Myvatn, Northern Iceland, Iceland, Europe
832-392418 - Geothermal area, Redwoods Forest, Whakarewarewa, Rotorua, North Island, New Zealand, Oceania
832-392419 - Guy with camera, Geothermal area, Redwoods Forest, Whakarewarewa, Rotorua, North Island, New Zealand, Oceania
832-391607 - Geothermal area, Wai-O-Tapu, Rotorua, North Island, New Zealand, Oceania
![Clay loaded with iron oxides and dried out, Rio Tinto, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.](https://images.robertharding.com/zoom/RM/RH/HORIZONTAL/860-288801.jpg "Clay loaded with iron oxides and dried out, Rio Tinto, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.<br />860-288801")
860-288801 - Clay loaded with iron oxides and dried out, Rio Tinto, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
![Reflections on Rio Tinto, near its source, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.](https://images.robertharding.com/zoom/RM/RH/HORIZONTAL/860-288798.jpg "Reflections on Rio Tinto, near its source, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.<br />860-288798")
860-288798 - Reflections on Rio Tinto, near its source, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
![R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.](https://images.robertharding.com/zoom/RM/RH/HORIZONTAL/860-288800.jpg "R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.<br />860-288800")
860-288800 - R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
![R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.](https://images.robertharding.com/zoom/RM/RH/VERTICAL/860-288799.jpg "R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.<br />860-288799")
860-288799 - R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.
832-390001 - Eyvindarhver hot spring, high temperature area, Hveravellir geothermal area, Kjoelur, highlands, Iceland, Europe
832-389996 - Hot spring, high temperature area Haukadalur, Golden Circle, Suourland, Iceland, Europe
832-388929 - Geothermal area with sulphur deposits and acidic brines, Dallol, Danakil depression, Ethiopia, Africa
832-388928 - Geothermal area with sulphur deposits and acidic brines, Dallol, Danakil depression, Ethiopia, Africa
832-385135 - Shield, 100 degrees Celsius, warns of boiling hot water, geothermal area Reykjadalur, Hverageroi, Hveragerdi, Iceland, Europe
832-385606 - Seltun, Seltun, hot springs and mud pots, geothermal area, Krysuvik high temperature area, Krisuvik, Reykjanes peninsula, near Reykjavik, Iceland, Europe
832-386493 - Geysir Strokkur on a sunny autumn day, hot spring ejects fountain, high temperature area Haukadalur, Golden Circle, southern Iceland, Iceland, Europe
832-386494 - Red stone with the inscription Geysir, next to a frozen water surface, high temperature area Haukadalur, Golden Circle, South Iceland, Iceland, Europe
832-387441 - Geyser Strokkur, geothermal area Haukadalur, Golden Circle, Southern Iceland, Iceland, Europe
832-387438 - Blesi thermal spring, Haukadalur geothermal area, Golden Circle, Southern Iceland, Iceland, Europe
832-384348 - Two tourists on a jetty in the thermal area, hot spring, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-384345 - Tourists on a jetty in the thermal area, steaming hot spring, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, North America
832-385819 - Fog and steam from hot springs, Orakei Korako Geothermal Park, Geothermal area, Hidden Valley, Taupo Volcanic Zone, North Island, New Zealand, Oceania
832-387439 - Blesi thermal spring, Haukadalur geothermal area, Golden Circle, Southern Iceland, Iceland, Europe
832-387440 - Geyser Strokkur, geothermal area Haukadalur, Golden Circle, Southern Iceland, Iceland, Europe
832-382919 - Baejarfell Lighthouse, high temperature geothermal area of Gunnuhver, Snaefellsnes, Iceland, Europe
832-382629 - Solfataras, fumaroles, mud pots, sulfur and other minerals, a woman on the viewing platform at the back, high-temperature geothermal area or Hverarond or Hverir, Namafjall mountains, Myvatn area, Norourland eystra, Iceland, Europe
832-381829 - Young man in a hot spring, near Eyjar og Miklaholt, Vesturland, Iceland, Europe
832-382073 - Thermal springs of Benjë, River Lengarica, Lengaricë, near Përmet, National Park Hotova-Dangell, behind the Nemërçka Mountains, Qar Gjirokastra, Gjirokastër, Albania, Europe
832-381270 - Steaming hot springs, geothermal area Hverarönd, also Hverir or Namaskard, Northern Iceland, Iceland, Europe
832-382155 - Young man in a hot spring, near Eyjar og Miklaholt, Vesturland, Iceland, Europe
832-381115 - Detailed view of the discoloration caused by bacteria and algae on a geyser, Geyser Hill, Old Faithful Area, Yellowstone National Park, Wyoming, USA, North America
832-381381 - Detailed view of the discoloration caused by bacteria and algae on a geyser, Geyser Hill, Old Faithful Area, Yellowstone National Park, Wyoming, USA, North America
832-380885 - Champagne Pool, hot thermal spring, Waiotapu, Waiotapu, Roturoa, North Island, New Zealand, Oceania
832-380927 - Krafla volcanic area, sulfur springs, Leirhnjúkur, Reykjahlíð, Mývatni, Island
832-380928 - Natural pool Grjótagjá, crevices, hot fountain, Reykjahlíð, Mývatni, Iceland, Europe
832-380804 - Two tourists standing beside steaming fumarole, solfatara in Hverarond, also Hverir or Namaskard, geothermal area, North Iceland, Iceland, Europe
832-380829 - Champagne Pool, hot spring, Waiotapu Geothermal Wonderland, Rotorua, North Island, New Zealand, Oceania
832-380832 - Champagne Pool, hot spring, Waiotapu Geothermal Wonderland, Rotorua, North Island, New Zealand, Oceania
832-380831 - Champagne Pool, hot spring, Waiotapu Geothermal Wonderland, Rotorua, North Island, New Zealand, Oceania
832-380830 - Champagne Pool, hot spring, Waiotapu Geothermal Wonderland, Rotorua, North Island, New Zealand, Oceania
832-380807 - Rising steam, Hverarond, also Hverir or Namaskard, geothermal area, North Iceland, Iceland, Europe
832-379332 - Coyote (Canis latrans), Geyser behind, Yellowstone National Park, Wyoming, USA, North America
746-88316 - Geothermal area Hveraroend near lake Myvatn and the ring road during winter with mud pools , fumaroles and solfataras. europe, northern europe, scandinavia, iceland, February
746-88258 - Geothermal area Hveraroend with mudpots, fumarales and solfataras near lake Myvatn and the ring road. europe, northern europe, iceland, February
746-88315 - Geothermal area Hveraroend near lake Myvatn and the ring road during winter with mud pools , fumaroles and solfataras. europe, northern europe, scandinavia, iceland, February
746-88317 - Geothermal area Hveraroend near lake Myvatn and the ring road during winter with mud pools , fumaroles and solfataras. europe, northern europe, scandinavia, iceland, February
832-378511 - El Tatio geyser field, Atacama Desert, Antofagasto region, Chile, South America
832-368200 - Strokkur Geyser, Haukadalur Valley, Golden Circle, Su√∞urland, Sudurland, Southern Iceland, Iceland, Europe
832-368319 - Hot spring, sinter terraces, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
832-368299 - Solfataras, fumaroles, mud pools, sulfur and other minerals, viewing platform, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe
832-368316 - Blue water pool, Bl√°hver hot spring, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
832-368096 - Morning Glory Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-373436 - Hot springs with Flamingos (Phoenicopteriformes, Phoenicopteridae) in the steaming water, Uyuni, Bolivia, South America
832-368298 - Solfataras, fumaroles, mud pools, sulfur and other minerals, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe
832-368317 - Blue water pool, Bl√°hver hot spring, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
832-368092 - Mineral deposits at a hot spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
832-368089 - Crested Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-368091 - Riverside Geyser, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-368241 - Steaming creek, hot springs and Rhyolite Mountains, Hveradallir high temperature area, Kerlingarfjoell, highlands, Iceland, Europe
832-368297 - Solfataras, fumaroles, mud pools, sulfur and other minerals, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe
832-368090 - Morning Glory Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-368095 - Sawmill Geyser, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-368234 - Tourists watching steam and a water spout, Strokkur geyser, backlit, Haukadalur valley, Golden Circle, Su√∞urland, Sudurland, southern Iceland, Iceland, Europe
832-370513 - Young woman enjoys bathing in hot spring, Blue Lagoon, Iceland, Europe
832-373438 - Geysers with water vapour against a deep blue sky, Uyuni, Bolivia, South America
832-368315 - Tourists watching a steam and water column, Stokkur geyser against the light, Haukadalur Valley, Golden Circle, Su√∞urland, South Iceland, Iceland, Europe
832-370514 - Young woman enjoys bathing in hot spring, Blue Lagoon, Iceland, Europe
832-373049 - People watching Strokkur Geyser errupting, fountain, hot springs, Haukadalur, Golden Circle, Iceland, Scandinavia, Northern Europe, Europe
832-368094 - Crested Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-369846 - Tourist on a boardwalk amidst the steam of the springs and geysers, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA
832-368093 - Shell Spring, geyser, hot spring, Biscuit Basin, Yellowstone National Park, Wyoming, USA
832-368098 - Castle Geyser, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-375943 - Steaming geysers, Norris Geyser Basin, Yellowstone National Park, Wyoming, USA, United States of America
832-368097 - Riverside Geyser, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-368318 - Sinter terraces, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
832-344043 - Facade of the Tettuccio thermal baths, Montecatini Terme, Pistoia Province, Tuscany, Italy, Europe
832-342990 - Firehole Spring in Lower Geyser Basin, Yellowstone National Park, Wyoming, USA
832-342987 - Chromatic Spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
832-312175 - A woman is relaxing in a Thermal bath close to the volcano Arenal, La Fortuna, Costa Rica, Central America
832-304424 - Myvatn Pool (Jarboein vi MËvatn), Myvatn, northern Iceland, Iceland, Atlantic Ocean
832-304426 - Myvatn Pool (Jarboein vi MËvatn), Myvatn, northern Iceland, Iceland, Atlantic Ocean
832-302567 - Break of dawn at the waterside of Yellowstone Lake, Yellowstone National Park, Wyoming, USA, United States of America
832-302564 - Break of dawn at the waterside of Yellowstone Lake, Yellowstone National Park, Wyoming, USA, United States of America
832-302582 - Dead trees, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, United States of America
832-302570 - Layers with thermophilic bacteria, Upper Geyser Basin, Yellowstone Nationalpark, Wyoming, USA, United States of America
832-294637 - Thermal spring in Saturnia with sulphur-containing water of the Monte Amiata Manciano Toskana Italien
832-264574 - Thermal waterfalls, travertine pools, Cascate del Molino, Saturnia, Province of Grosseto, Tuscany, Italy, Europe
832-259870 - Geothermal region of Gunnuhver in southern Iceland with steam from the countless holes and fractures in the earth's crust, Iceland, Europe
832-259891 - Three Icelandic women with beer in the warm spring, hot pool, Landmannalaugar, Iceland, Europe