Deep below the surface in South Dakota, construction crews have been working tirelessly to carve out a network of caverns and tunnels that one day will house a huge neutrino experiment. Their efforts ...

A vast thermal lake hidden deep beneath southern Albania has been confirmed as thelargest known underground thermal lake on ...

Discover the jaw-dropping historical icon that is the underground wonderland of Mammoth Cave National Park in Kentucky.

Whether it’s 100 degrees or below-freezing, these caverns in the Sierra Nevada foothills stay at a constant temperature for ...

Add Yahoo as a preferred source to see more of our stories on Google. A new attraction at Louisville's Mega Cavern is your chance to take a break from summer's heat while you journey through the ...

Excavation workers have finished carving out the future home of the gigantic particle detectors for the international Deep Underground Neutrino Experiment. Located a mile below the surface of Lead, ...

BELLEVUE, Ohio – Looking for a cool adventure during the hottest days of summer? Head underground at Seneca Caverns, where the temperature is always a cool 54 degrees. The rock formations are pretty ...

Scientists have confirmed a cave on the moon, not far from where Neil Armstrong and Buzz Aldrin landed 55 years ago, and suspect there are hundreds more that could house future astronauts. An ...

Eleven other people were hospitalized with minor injuries after a boat traveling through a man-made cavern in Lockport, N.Y., tipped over, officials said. By Ed Shanahan Lola Fadulu and Dan Higgins ...

Although most of the state’s nearly seven thousand known caves are on private property, Texas does boast many popular cave systems that are easily accessible and open to the public, including these ...