Caves
US - Barren County
| Name | Length | Depth |
|---|---|---|
| Frozen Niagara Entrance | 580 km | |
| Mammoth System Ferguson Entrance | 107 m | |
| Mammoth System Morrison Entrance | 107 m | |
| American White Onyx Cave | 0 m | |
| Barnett’s Cave | 0 m | |
| Crystal Onyx Cave | 0 m | |
| Diamond Caverns | 0 m | |
| Dixie Onyx Cave | 0 m | |
| Ginger Pit | 0 m | |
| Indian Cave | 0 m | |
| Onyx Cave | 0 m | |
| Outlaw Cave | 0 m | |
| Saltpeter Cave | 0 m | |
| Sand Cave | 0 m | |
| Skaggs Creek Saltpetre Cave | 0 m | |
| Thompson Cave | 0 m |