Historical Marker 209 - Saltpeter Cave is located on 344 Caveland Drive, Olive Hill, Kentucky. It was dedicated September 27, 1963.
Description[]
Saltpeter mined here from which gunpowder was made that was used by Kentucky riflemen during the War of 1812. There are remains of those works in cave. Reputed rendezvous for counterfeiters in early years. Artifacts and Indian graves found in cavern.