And tucked away in the southwestern corner of Missouri, in the small town of Noel (pronounced “Nole,” not like Christmas), Bluff Dwellers Cave stands as one of the most spectacular examples of ...

Carved from stone over thousands of years, caves are nature’s underground masterpieces. Here’s the wild process that turns solid rock into surreal worlds—math errors and all.

That gust of cool air is what led two National Park Service employees to stumble upon Crystal Cave while fishing at a nearby ...