• The Historic Entrance of Mammoth Cave

    Mammoth Cave

    National Park Kentucky

Clean Cities National Parks Initiative

Clean Cities program logo
Clean Cities partners with the National Park Service through the Clean Cities National Parks Initiative to support transportation projects that educate park visitors on the benefits of reducing dependence on petroleum, cutting greenhouse gases, and easing traffic congestion. This initiative complements the NPS Climate Friendly Parks program by demonstrating the environmental benefits of reducing petroleum use.
 


 
Green River Ferry and Flowering Flame logo

Did You Know?

Soda straw stalactite

Stalactites grow downward – they hang "tight" to the ceiling – while stalagmites grow upward – they "might" reach the ceiling someday. Mammoth Cave's formations include many types of calcite formations.