As home to the longest-known cave system in the world, Mammoth Cave National Park is ... that instantly reminds you of the real Niagara Falls on the U.S.-Canadian border. The effect was created ...

Explore Mammoth Cave National Park, the longest cave system on Earth, featuring the richest known habitat for cave wildlife in the world. It may be difficult to think of caves as spacious and grand, ...

There are alot of great caves in the US but there is a hot debate over which one is better Mammoth Cave or Carlsbad Caverns.

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.