Louisiana's only known cave can be found within Kisatchie National Forest. Here's how to get to it and what you'll find there.

Underground does not forgive. It punishes small mistakes with big consequences. Deadly is not drama. It is a mix of objective ...

The Lava River Cave outside of Bend is a mile deep and 60 feet tall. Here's how to explore Oregon's longest lava tube.

Hidden River Cave was once filled with heavy metals and sewage that made the surrounding town smell awful. After a cleanup, ...

Rising water quickly transforms an underground passage into a dangerous trap, leaving one person alone inside the cave.

In 1963, Texas transportation crews drilling near I-35 in Georgetown punched through rock and uncovered a massive underground cave system hidden for thousands of years. Now, more than 60 years later, ...

Researchers have discovered the remains of an ancient shark deep inside the world's longest cave system. The newly discovered shark, plucked from the walls of Mammoth Cave in Kentucky, lived ...

The fossilized tooth of a newly discovered ancient shark species - dating back about 340 million years - has been unearthed in the world's largest cave system, officials said.

Such animal diversity implies that the cave and surrounding coastal areas were mostly thawed 75,000 years ago. While still technically in an ice age at the time, the period was markedly warmer.

A new species of ancient shark, named Macadens olsoni, was found in Mammoth Cave, Kentucky, known for its curved teeth meant for crushing sea creatures.

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