Carlsbad Caverns is home to some of the most spectacular examples of underground geologic features found anywhere in the United States. Located in southeastern New Mexico, the park contains more than ...

The umbrella leaks at places called sinkholes, from which surface water makes its way underground, eroding the limestone into a honeycomb of caverns. Mammoth, the world's longest known cave system ...

On January 30, 1925, cave explorer Floyd Collins made history when he became trapped while exploring Sand Cave near historic Mammoth Cave. It took nearly two weeks to reach Floyd who was found dead of ...