Mammoth Cave National Park
NPS History
NPSHistory.comMammoth Cave National Park in central Kentucky protects the world's longest known cave system, with over 420 miles of surveyed passageways — more than twice the length of any other known cave. The cave was formed over millions of years as mildly acidic water dissolved the park's thick limestone bedrock. Native Americans explored and mined minerals in the cave at least 4,000 years ago, and during the War of 1812, enslaved laborers were forced to mine calcium nitrate (saltpeter) from the cave for use in gunpowder. Enslaved men, most notably Stephen Bishop, served as the cave's first guides in the 1830s and 1840s, making major explorations and mapping discoveries. The park was established in 1941 and was designated a UNESCO World Heritage Site in 1981 and an International Biosphere Reserve in 1990.
📚 Learn More at NPSHistory.com →Under review: Interpretive materials
Mammoth Cave National Park in KY is one of hundreds of National Park Service sites where interpretive content has been flagged under Secretary's Order 3431. This directive requires parks to review materials that could be considered negative about past or living Americans — a standard that threatens the factual historical record these sites were created to preserve.
Why this matters: Mammoth Cave National Park is one of 466+ National Park Service sites where historically accurate interpretive content has been flagged under Secretary's Order 3431. Over 300 million people visit national parks each year. For many — especially schoolchildren — these visits are their first and deepest encounter with American history.
Under review: Exhibit panels (17 items)
Mammoth Cave National Park in KY is one of hundreds of National Park Service sites where interpretive content has been flagged under Secretary's Order 3431. This directive requires parks to review materials that could be considered negative about past or living Americans — a standard that threatens the factual historical record these sites were created to preserve.
Why this matters: Mammoth Cave National Park is one of 466+ National Park Service sites where historically accurate interpretive content has been flagged under Secretary's Order 3431. Over 300 million people visit national parks each year. For many — especially schoolchildren — these visits are their first and deepest encounter with American history.
Under review: Publications (6 items)
Mammoth Cave National Park in KY is one of hundreds of National Park Service sites where interpretive content has been flagged under Secretary's Order 3431. This directive requires parks to review materials that could be considered negative about past or living Americans — a standard that threatens the factual historical record these sites were created to preserve.
Why this matters: Mammoth Cave National Park is one of 466+ National Park Service sites where historically accurate interpretive content has been flagged under Secretary's Order 3431. Over 300 million people visit national parks each year. For many — especially schoolchildren — these visits are their first and deepest encounter with American history.
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