• The Historic Entrance of Mammoth Cave

    Mammoth Cave

    National Park Kentucky

Springs and Seeps

Nature and Science

Blue Spring

Emerging Springs
The groundwater that flows underground from the sinkhole plain south of the park into the Green River finds its outlet through innumerable springs. Among the most notable springs in the park are River Styx Spring, Echo River Spring, and Turnhole Spring.

Did You Know?

Did You Know? - Mammoth Cave is the world's longest known cave.

Mammoth Cave is the world's longest known cave, with more than 400 miles of interconnected passages—so long that if the second and third longest caves in the world were joined together, Mammoth Cave would still be the planet's longest cave and have more than 100 miles left over!