• 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?

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.