Mammoth Cave National Park Tee

Over 400 miles of passageways beneath the Kentucky hills - the longest known cave system on earth, and still being mapped. This design features a bat in full flight through a cathedral of stalactites and stalagmites, the kind of darkness that hums with its own geology. Mammoth Cave has drawn explorers underground for centuries. There is nothing else like it in the national park system.Made from 100% cotton and printed in the USA. Like all of our gear, every purchase helps support National Parks.