• 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?

Grease-oil lamp

The grease-oil lamp was used to illuminate Mammoth Cave for more than a century. Designed after New England whale-oil lanterns, these lamps used cooking grease to light the way.