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Outdoor geothermal swimming pool and power plant at the Blue Lagoon, Iceland, Polar Regions
Sulphur springs, Soufriere, St. Lucia, Windward Islands, West Indies, Caribbean, Central America
The Blue Lagoon, Reykjanes Peninsula, Iceland, Polar Regions
Algae in the hot springs at Orakei Korako, South Auckland, North Island, New Zealand, Pacific
Geothermal steam from geyser vent between eruptions, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
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
Steam and bubbling mud pools in thermal area, Rotorua, South Auckland, North Island, New Zealand, Pacific
Aerial view of Wairakei thermal power area, North Island, New Zealand, Pacific
Hierve el Agua (the water boils), hot springs, water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
Cascade Terrace at Orakei Korako Thermals in the North Island of New Zealand, Pacific
Tourists relaxing in hot pools dug on beach, Hot Water Beach, Coromandel Peninsula, Waikato, North Island, New Zealand, Pacific
Tourists taking pictures of Oskurholshver (screaming spring), famous hot spring at Hveravellir, Kjolur, Iceland, Polar Regions
Hverir geothermal fields at the foot of Namafjall mountain, Myvatn lake area, Iceland, Polar Regions
Tourists around the hot mud pools at Namaskard thermal area, Hverarond, near Lake Myvatn, North area, Iceland, Polar Regions
Steam rising from hot springs at Krisuvik on the south west peninsula of Iceland, Polar Regions
Travertine calcite deposits, Minerva Terrace, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
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
El Tatio Geysers and fumaroles, Andes at 4300m, northern area, Chile, South America
The Blue Lagoon, Reykjanes Peninsula, Iceland, Polar Regions
Kilauea thermal area, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Hot springs, Ranong, Thailand, Southeast Asia, Asia
Hierve el Agua (the water boils), hot springs, water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
Hot mud, Vulcanetti di Macalube, Sicily, Italy, Europe
Blue Lagoon (mineral baths), near Keflavik, Iceland, Polar Regions
Young woman enjoying bathing in hot spring, Myvatn, Iceland, Polar Regions
Hierve el Agua (the water boils), hot springs, Oaxaca, Mexico, North America
Mataranka thermal pool in the outback of the Northern Territory, Australia, Pacific
Geysir, Iceland, Polar Regions
Steaming volcanic mud pools, Rincon de la Vieja National Park, at foot of Rincon Volcano, Guanacaste, Costa Rica, Central America
Hierve el Agua (the water boils), hot springs, Oaxaca, Mexico, North America
El Tatio Geysers and fumaroles, Andes at 4300m, northern area, Chile, South America
El Tatio Geysers and fumaroles, Andes at 4300m, northern area, Chile, South America
Hierve el Agua (the water boils), water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
Hierve el Agua (the water boils), hot springs, water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
Geothermal factory and swimming pool, Blue Lagoon, Iceland, Polar Regions
Tourists looking at geysers in Eduardo Avaroa Andean National Reserve, Bolivia, South America
Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Hverquellir geothermal area, interior highlands, Iceland, Polar Regions
Hierve el Agua (the water boils), water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
Steam from hot springs and snow-free hot ground in Midway Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Young woman enjoying bathing in hot spring, Blue Lagoon, Iceland, Polar Regions
Geothermal factory and swimming pool, Blue Lagoon, Iceland, Polar Regions
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
Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America
Hierve el Agua (the water boils), hot springs, water rich in minerals bubbles up from the mountains and pours over edge, Oaxaca, Mexico, North America
Steaming fumaroles (volcanic vents) at Hverir (Hverarond), east of Myvatn in the central area, Iceland, Polar Regions
The Blue Lagoon near Reykjavik, Iceland, Polar Regions
Mud Cauldron, Mud Volcano area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Steaming fumaroles (volcanic vents) at Hverir (Hverarond), east of Myvatn in the central area, Iceland, Polar Regions
Champagne Pool, Waiotapu Thermal Area, Rotorua, North Island, New Zealand, Pacific
The Blue Lagoon near Reykjavik, Iceland, Polar Regions
Abyss Pool, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
The Blue Lagoon near Reykjavik, Iceland, Polar Regions
Black Pool, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Strokkur geyser erupting in Geysir, southwest region, Iceland, Polar Regions
Thermal pools at Geysir with Strokkur geyser erupting in the background, Geysir, southwest area, Iceland, Polar Regions
Abyss Pool, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Thermal pools at Geysir, southwest region, Iceland, Polar Regions
One of the many bubbling mud pools in a hot spring area on the outskirts of Hveragerdi, a geothermal hot spot, with steam rising from fumeroles right in the middle of town, South West Iceland, Polar Regions
A Geysir a split second before its eruption at Geysir in Iceland, Polar Regions
Fumaroles emitting steam in the geothermal area of Hverir near Myvatn, northern Iceland, Polar Regions
Fumaroles emitting steam in the geothermal area of Hverir near Myvatn, northern Iceland, Polar Regions
Bubbling mud pools in the geothermal area of Hverir near Myvatn, Northern Iceland, Polar Regions
Bubbling mud pools in the geothermal area of Hverir near Myvatn, Northern Iceland, Polar Regions
A Geyser erupting at Geysir in Iceland, Polar Regions
Bubbling mud pools in the geothermal area of Hverir near Myvatn, Northern Iceland, Polar Regions
Thermal hot springs near Nadi on Fiji, Pacific
Bubbling mud pools in the geothermal area of Hverir near Myvatn, Northern Iceland, Polar Regions
A Geysir a split second before its eruption at Geysir in Iceland, Polar Regions
One of the many bubbling mud pools in a hot spring area on the outskirts of Hveragerdi, a geothermal hot spot, with steam rising from fumeroles right in the middle of town, South West Iceland, Polar Regions
Geothermal ground venting steam in Hengill, Iceland, Polar Regions
One of the many bubbling mud pools in a hot spring area on the outskirts of Hveragerdi, a geothermal hot spot, with steam rising from fumeroles right in the middle of town, South West Iceland, Polar Regions
A Geysir a split second before its eruption at Geysir in Iceland, Polar Regions
A Geysir at Geysir in Iceland, Polar Regions
A Geyser at Geysir in Iceland, Polar Regions
A Geysir at Geysir in Iceland, Polar Regions
Hot springs and geothermal ground on the Reykjanes peninsula, Iceland, Polar Regions
A Geyser at Geysir in Iceland, Polar Regions
Strokkur geyser erupting, in the Geysir hot springs area, Haukadalur geothermal area, Southwest Iceland
Strokkur geyser erupting, in the Geysir hot springs area, Haukadalur geothermal area, Southwest Iceland
Pohutu Geyser, Rotorua, Whakarewarewa area, Rotorua, North Island, New Zealand
Champagne Pool, Waio-tapu crater lake, Geothermal area near Rotorua, North Island, New Zealand
Thermal area Seltunn at lake Kleifarvatn, Reykjanes peninsula, Iceland, Europe
Open-air area of the Gellert Baths, People in the open-air area of the Gellert Baths, Buda, Budapest, Hungary
Open-air area of the Gellert Baths, People in the open-air area of the Gellert Baths, Buda, Budapest, Hungary
Open-air area of the Gellert Baths, People in the open-air area of the Gellert Baths, Buda, Budapest, Hungary
Strokkur Geyser, Haukadalur Valley, Golden Circle, Su√∞urland, Sudurland, Southern Iceland, Iceland, Europe
Hot spring, sinter terraces, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
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
Blue water pool, Bl√°hver hot spring, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
Morning Glory Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
Hiker on a trail, hot springs and snow-capped Rhyolite Mountains, Hveradallir high temperature region, Kerlingarfjoell, highlands, Iceland, Europe
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
Blue water pool, Bl√°hver hot spring, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe
Crested Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
Steaming creek, hot springs and Rhyolite Mountains, Hveradallir high temperature area, Kerlingarfjoell, highlands, Iceland, Europe
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
Morning Glory Pool, a hot spring in Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
Tourists watching steam and a water spout, Strokkur geyser, backlit, Haukadalur valley, Golden Circle, Su√∞urland, Sudurland, southern Iceland, Iceland, Europe
Tourists watching a steam and water column, Stokkur geyser against the light, Haukadalur Valley, Golden Circle, Su√∞urland, South Iceland, Iceland, Europe