Diamond Caverns in Park City, Kentucky was discovered on July 14, 1859.[1] Tours are available year around; closed Thanksgiving, Christmas Eve, and Christmas. Tours last one hour and is a half mile round trip.[1]
^ abSides, Stanley D. (2007). Diamond Caverns: Jewel of Kentucky's Underground. Dayton, Ohio: Cave Books. p. 5. ISBN978-0-939748-67-9.