Cave explorer Floyd Collins got trapped in Sand Cave in Kentucky 100 years ago and later died. The incident drew national attention and helped lead to the creation of Mammoth Cave National Park.

As home to the longest-known cave system in the world, Mammoth Cave National Park is ... including along a 9-mile portion of a converted railroad line. The rivers also aid exploration, with ...

Mammoth Cave has been captivating imaginations for thousands of years. “Obviously, the geology is amazing. It's what (first) brought people here and what brings people back to study this region ...