Organ Cave, Ronceverte

Organ Cave is a large and historic cave in Greenbrier County, West Virginia, USA. The surrounding community takes its name from the cave.
In 1973, the Organ Cave System — also known as the Organ-Hedricks Cave System — was registered as a National Natural Landmark for being "the largest cave system in the State, containing many caves, one of which is Organ Cave. Noted also for its saltpeter troughs and vats." (It is now the third-longest known cave in the state, after the Friars Hole Cave System in the same county and the Hellhole System in Pendleton County.) Organ Cave has also been listed on the National Register of Historic Places since 2005.
Significant fossil discoveries bear witness to the early natural history of Organ Cave: giant ground sloth, grizzly bear, nine-banded armadillo, sabre-tooth cat, reindeer and an Ice Age porcupine. Organ Cave's human history is attested by flint arrowheads used by early American Indians. Evidence of early white settlers in the cave is suggested by the date "1704" scratched on a wall, but this may be a later addition since the first white settlers to Greenbrier County came only in the 1740s.