The surface of Mammoth Cave National Park encompasses about 80 square miles. No one knows how big the underside is. More than 365 miles of the five-level cave system have been mapped, and new ...

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 is never a bad time to visit Mammoth Cave National Park since the underground temperature is fairly consistent year-round and stays between 55 and 58 degrees Fahrenheit. Even after a rain shower ...