2: Mammoth Mysteries. Mammoth Cave National Park.

Grab your flashlight and stick with the group as we enter Mammoth Cave National Park. With hundreds of miles of caves and thousands of years of history, it's easy to get lost in here. Come listen as Danielle guides us through the Park's colorful and at times, dark, past. Hear the stories of those who have explored, lived and died in these caves, and perhaps never left.

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Sources: National Geographic. Oh Ranger. How Stuff Works. Smithsonian. National Parks Traveler.