United States Kentucky Mammoth Cave
Green River Ferry
A ferry service in a national park of Kentucky, providing passage over a river among extensive cave systems.
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Mammoth Cave National Park: The Complete Guide for 2023
Read more...Mammoth Cave —the longest tunnel cave system in the world—formed over 10 million years ago, but it wasn’t designated as an official US national park until July 1, 1941. The cave earned its name for both the size of its massive caverns and its hundreds of miles of explorable passageways. Within the cave’s 412 miles […]