https://www.wvhistoryonview.org/catalog/013523https://www.wvhistoryonview.org/image/013523.jpgEntrance to Organ Cave, Greenbrier County, W. Va.Counties--Greenbrier--Scenes and Views.Caves--West Virginia--Greenbrier County.Unidentified man standing at the mouth of Organ Cave. Organ Cave is the second largest commercial cave in the United States. During the Civil War, Confederate General Robert E. Lee ordered the Organ Cave, among others, to be mined for nitre, which was needed to make gunpowder.West Virginia History OnView