What cave, located in Kentucky, has over 400 miles of passages?
Sand Cave, Kentucky Flint Ridge Cave System Mammoth cave Mammoth Cave National Park Crystal Cave (Kentucky) Mammoth Caves Mammoth Cave System Sand Cave, KY Mammoth-Flint Ridge Cave System Kentucky Cave Wars Mamoth cave Mammoth Cave, Kentucky Mammouth Cave Franklin Gorin Floyd Collins Crystal Cave Mamouth Cave Mammoth Cave
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mammoth cave
WikipediaEntity
Mammoth Cave