Marker text: DIAMOND CAVERNS
The cave is famed for its pristine cave formations, and was shown with Mammoth Cave in the late 1800s. Mammoth Cave Railroad ran nearby. Passages found in 1936 doubled the length of the cave. It is the second-oldest show cave in Kentucky and the fourth-oldest continuously visited commercial cave in the United States. Over
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Kentucky Historical Society, Kentucky Department of Highways, 2008