Colorado is one of five states holding 95% of the United States’ geothermal potential. Geothermal energy, the ...

Sure, human-made spas are nice, but nothing beats a spa created by nature. Usually made by geothermal activity, natural hot springs are like a thoughtful gift from Mother Earth to humans (and ...

Japanese hot springs—better known as onsens—are prized for their zen experience, with travelers coming from around the world to lounge in natural pools and bliss out. The country is home to ...