Cavités
US - Armstrong County
| Nom | Longueur | Profondeur |
|---|---|---|
| Bradys Bend Cave | 2 km | 0 m |
| Hindman Cave | 1 km | 0 m |
| Apollo Clay Mine | 701 m | 0 m |
| Cove Run Cave | 305 m | 0 m |
| Buffalo Creek Cave | 102 m | 3 m |
| Buttermilk Breakdown Cave | 27 m | 0 m |
| Whitesucker Shelter | 9 m | 0 m |
| Cowanshannock Cave | 0 m | |
| Cowanshannock Creek Cave | 0 m | |
| Cricket Cave | 0 m | |
| Wolf Hole Cave | 0 m |