Nearly 500 buildings in the state capital get their heat from a clean, renewable source located deep in the ground.

Yes, they're crowded — but for a good reason. Here's why you should add these destinations to your bucket list.

Kyle Juszczyk's wife Kristin sends 3-word message as 49ers officially lock him in with $8,000,000 deal In Pics: Kyle Juszczyk and wife Kristin enjoy geothermal spa day at Iceland’s famous Blue ...

Although Caribbean destinations are always popular, spring is traditionally the cheaper shoulder season, and Jamaica is ...

This story was produced in partnership with the Pulitzer Center. It is part four in a four-part series. Read part one here, part two here and part three here. Correction: This article has been ...

This story was produced in partnership with the Pulitzer Center. It is part four in a four-part series. The Texas rock ...

A historic donation from the Harris family could quadruple Boise's geothermal energy system, which has been sustainably heating nearly 100 buildings for decades.

This story was produced in partnership with the Pulitzer Center. It is part four in a four-part series. The Texas rock formation known as the Eagle Ford shale was once at the heart of the oil ...

It has support from the Trump administration and has advanced thanks to oil and gas techniques. But it accounts for just 1 percent of American electricity. A new darling of renewable energy is ...