Getty Images
hot spring at sunrise, people swimming
hot spring at sunrise, few unrecognizable people are swimming, Genichesk, Ukraine
Getty Images
CU Shot of steam coming through Mammoth Springs / Wyoming, United States
CU Shot of steam coming through Mammoth Springs / Wyoming, United States
Getty Images
MS Boiling water on earth's crust and steam rising in Krysuvik Geothermal area / Reykjanes peninsula, Iceland
MS Boiling water on earth's crust and steam rising in Krysuvik Geothermal area / Reykjanes peninsula, Iceland     
Getty Images
Japanese Macaques (Macaca fuscata) bathing in thermal spring: submissive behaviour to dominant monkey, in the Onsen of Jigokudani yaenkoen, Nagano Prefecture
Japanese Macaques (Macaca fuscata) bathing in thermal spring: submissive behaviour to dominant monkey, in the Onsen of Jigokudani yaenkoen, Nagano Prefecture
Getty Images
FDR Visits Yellowstone National Park
/ President Franklin Roosevelt and his entourage arrive at Yellowstone Park / FDR enjoys the views with his family by car / CU waterfall / CU FDR smiling in car / president drives past hot springs. FDR Visits Yellowstone National Park on...
Getty Images
MC CU TU Bubbling hot spring water in underwater with rises to half water with sky and land / Lake Bogoria, Kenya
MC CU TU Bubbling hot spring water in underwater with rises to half water with sky and land / Lake Bogoria, Kenya
Getty Images
Long Shot tilt-up - Steam from a geyser rises above a microbial colored pool at Yellowstone National Park. / Wyoming, USA
Long Shot tilt-up - Steam from a geyser rises above a microbial colored pool at Yellowstone National Park. / Wyoming, USA
Getty Images
WS View of Ashiyu, traditional way for cool down of hot water at most famous hot spring, Kusatsu Onsen / Kusatsu, Gunma Prefecture, Japan
WS View of Ashiyu, traditional way for cool down of hot water at most famous hot spring, Kusatsu Onsen / Kusatsu, Gunma Prefecture, Japan 
Getty Images
mammoth hot spring yellowstone with building in background.
Mammoth hot spring Yellowstone with building in background.
Getty Images
Natural Hot Spring
http://www.shortjourneys.com/istockphoto/istock_places_costarica.jpg
Getty Images
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the geothermally heated water
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the...
Getty Images
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the geothermally heated water
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the...
Getty Images
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the geothermally heated water
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the...
Getty Images
Aerial View of Winter Wonderland Pagosa Springs Colorado Bridge over San Juan River Hot Springs Steam Lifting Winter Snow Covered Rocky Mountains
Aerial View of Winter Wonderland Pagosa Springs Colorado Bridge over San Juan River Hot Springs Steam Lifting Winter Snow Covered Rocky Mountains
Getty Images
clean water in spa bathtub in modern bathroom
clean water in spa bathtub in modern bathroom
Getty Images
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the geothermally heated water
A geothermal energy project by Newcastle University, funded by the Dept of Energy and Climate Change. This project involves drilling 6,000 feet beneath Newcastle, on the site of the old Newcastle Brown Brewery. At this depth, the...
Getty Images
tilt down wide shot of sulphur caldron in yellowstone
a tilt down wide shot of sulphur caldron in yellowstone national park, usa