Atlas Obscura is organizing trips! Join us on an adventure »
Today Only: 50% off Atlas Obscura books and calendars at Barnes & Noble »
The Perfect Gift for Travelers: Our #1 New York Times® best selling book »

Mammoth Cave, Kentucky

Obscura Day 2015: Hidden Waterways of Mammoth Cave National Park

Join researchers in conducting a dye-tracing experiment as we track the flow of water through the world's longest cave system!

Where does the water go?

Mammoth Cave scientists have searched and researched this question for decades! In a karst area, water doesn't stay on the surface, but drains into the earth through cracks and sinkholes as it seeks underground rivers at the water table.

Join researchers from Mammoth Cave National Park and Western Kentucky University this Obscura Day as they follow the water via dye trace. We'll be placing “bugs” (dye receptors) deep in Mammoth Cave and at surface springs along Green River, before dumping dye in ridge top streams to discover and record where the water goes.

This 4-hour activity is considered strenuous and requires walking 2+ miles and ascending/descending 450 steps. Participants should wear comfortable walking shoes or boots, and be prepared to possibly encounter poison ivy, ticks, and poisonous snakes.

LIMITED CAPACITY; RSVP REQUIRED.

Hosted by Mammoth Cave National Park
Saturday, May 30; 8:30am - 12:30pm
Cost: FREE, but space is limited. Please remember to RSVP.
Meet-up will be at the park visitor center at 8:30am sharp!