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Grand Prismatic Spring and Midway Geyser Basin
The same geothermal heat that can help you reduce your electricity bill is responsible for some of the world's most stunning natural wonders: Hot springs.
When hot water bubbles up through the Earth's crust, the resulting pools are soothing, mineral-rich springs that have been used for medical, therapeutic, and spa treatments for centuries -- and also leave behind minerals and sediment that create dazzling landscapes.
Yellowstone's Grand Prismatic Spring, at 370 feet across, is the third-largest hot spring in the world, and the biggest in the United States (the other two are in New Zealand); the temperature ranges between 147 and 188 degrees Farenheit.
Read the full story: 10 of the World's Most Dazzling Natural Hot Springs
Photo: Wikimedia Commons
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