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The El Tatio Geothermal Field, located in the Altiplano of northern Chile, South America
Natural pool of boiling water, geothermal area, Te Puia, Gisborne District, North Island, New Zealand, Pacific
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Geyser and steam vents at Te Puia, Gisborne District, North Island, New Zealand, Pacific
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Cliff Geyser erupting in the Black Sand Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Steaming fumaroles by Lake Linow, a popular volcanic attraction and geothermal centre south of Tomohon city, Lake Linow, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Boy fishing on dock by changing colour Lake Linow, a popular volcanic attraction and geothermal centre south of Tomohon city, Lake Linow, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Steaming turquoise blue volcanic pond of Hell Valley, Noboribetsu, Hokkaido, Japan, Asia
Mount Naka active crater lake, Mount Aso, Kyushu, Japan, Asia
Mount Hiyori rises above Oyunuma Lake in Hell Valley, Noboribetsu, Hokkaido, Japan, Asia
The Blue Crater Lake of Viti, which appeared after an eruption in 1875, part of the sulphurous geothermal area of Namafjall, Reykjahlio, Iceland
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Belgian Pool, in the Norris Geyser Basin area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
A steaming volcanic pool at Geysir, in the Golden Circle, in southwest Iceland, Polar Regions
A thermal mud pool bubbles near to Wai-o-tapu Thermal Wonderland, Rotorua, North Island, New Zealand, Pacific
Belgian Pool, in the Norris Geyser Basin area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Leirhnjukur thermal area and eruption site near Krafla geothermal power station, Lake Myvatn, North area, Iceland, Polar Regions
Namafjall Geothermal Area in Iceland, Europe
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Champagne Pool in the Waiotapu geothermal area in the North Island, New Zealand, Pacific
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Old Faithful Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Porcelain Springs, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Colourful Emerald Pool, Black Sand Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Bjarnaflag geothermal power station and diatomite factory, Reykjahlid village, Lake Myvatn, North area, Iceland, Polar Regions
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Seltun geothermal area, Krysuvik, Reykjanes peninsula, Iceland, Polar Regions
Opalescent pool in the Black Sand Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring and bacterial mats, Midway Geyser Basin, Yellowstone National Park, Teton County, Wyoming, United States of America, North America
Crested Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring and bacterial mats, Midway Geyser Basin, Yellowstone National Park, Teton County, Wyoming, United States of America, North America
Steam rising from geothermal pools at sunrise in winter, Geysir, Haukardalur Valley, Iceland, Polar Regions
Canary Spring, Travertine Terraces, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Geothermal power plant, Blue Lagoon, Grindavik, Iceland, Polar Regions
Hot Springs, Lower Geyser Basin, Yellowstone National Park, Wyoming, United States of America, North America
Daisy Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Namafjall Geothermal Area in Iceland, Europe
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
View of hot springs in the Haukadalur valley on the slopes of Laugarfjall hill, Iceland, Polar Regions
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Hot Springs, Lower Geyser Basin, Yellowstone National Park, Wyoming, United States of America, North America
Grand Prismatic Spring and bacterial mats, Midway Geyser Basin, Yellowstone National Park, Teton County, Wyoming, United States of America, North America
Hot water in a snowy cold region, the Golden Circle, Iceland, Polar Regions
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Travertine terraces in Mammoth hot springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Geothermal power plant and Blue Lagoon at Svartsengi, Iceland, Polar Regions
Blue lagoon, Svarsengi geothermal plant, Iceland, Polar Regions
Champagne Pools steaming, Waiotapu thermal reserve, Rotorua, South Auckland, North Island, New Zealand, Pacific
Mount Fuji (3776m), Owakidani geothermal park, Hakone, Honshu Island, Japan, Asia
Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Outdoor geothermal swimming pool and power plant at the Blue Lagoon, Iceland, Polar Regions
Castle and Sawmill Geysers in eruption in Old Faithful Geyser Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Hot water pools in this area of geothermal activity, Geysir, Iceland, Polar Regions
Pohutu Geyser at Te Puia Wakarewarewa Geothermal Village, Rotorua, Taupo Volcanic Zone, North Island, New Zealand, Pacific
The Blue Lagoon, Reykjanes Peninsula, Iceand, Polar Regions
Geothermal bathing, Blue Lagoon, Reykjanes Peninsula, Iceland, Polar Regions
Outdoor geothermal swimming pool and power plant at the Blue Lagoon, Iceland, Polar Regions
Echinus Geyser, erupts every hour in Norris Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Hikers on Tongariro Crossing trek, Emerald Lakes in geothermal area, Tongariro National Park, UNESCO World Heritage Site, Taupo, North Island, New Zealand, Pacific
Steam and bubbling mud pools in thermal area, Rotorua, South Auckland, North Island, New Zealand, Pacific
Blisters measuring about 10 cm across in boiling mud pool, Mud volcano, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Buffalo beside Firehole River in winter in Midway geothermal basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Greenhouses growing tomatoes heated by geothermal hot water near Husafell in Iceland, Polar Regions
A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland
A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland
A view of the boiling mud at N�ï�¿�½�Ã�ºmafjall, Iceland
A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland
A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland
A Geysir a split second before its eruption at Geysir in Iceland, Polar Regions
A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland
Four friends relax at the Blue Lagoon near at Keflavik in Iceland, Polar Regions
The Blue Lagoon near at Keflavik in Iceland, Polar Regions
Volcanic Caldera, Geothermal landscape, sulphur cloud. Yankicha Island, (Bering Sea), Russia, Asia
The Perlan building, designed around five huge water tanks that hold geothermally heated water, Reykjavik, Iceland, Polar Regions
Guests from the Lindblad Expedition ship National Geographic Explorer lay in the relatively warm waters of the caldera at Deception Island, South Shetland Islands, Antarctica
Guests from the Lindblad Expedition ship National Geographic Explorer lay in the relatively warm waters of the caldera at Deception Island, South Shetland Islands, Antarctica
2008 Uzon Valley Vista, geothermal ground, 2008, Water table, mud flats, sulphuric mud, volcanic mud, geothermal surface. Valley Of Uzon, Valley of Geysers, Petroavlovsk, Russia, Asia