Arenal is a landscape dominated by its perfectly conical volcano, where geothermal waters bubble beneath the surface and the ...

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

A park scientist noticed it about two weeks after a hydrothermal explosion along a boardwalk during the park’s overactive ...

According to the Yellowstone Volcano Observatory, it’s probable that this new hydrothermal feature is connected to activity ...

Most visitors know Old Faithful and the Steamboat Geyser, and now there’s a new geothermal vent getting attention. When it’s ...