Caves
US - Skamania County
| Name | Length | Depth |
|---|---|---|
| Ape Cave Main Entrance | 4 km | 182 m |
| Dynamited Cave | 3 km | 99 m |
| Falls Creek Cave | 2 km | 126 m |
| New Cave | 2 km | 42 m |
| Ole's Cave | 1 km | 0 m |
| String Cave | 0 m | |
| Bat Cave | 0 m | |
| Big Cave | 0 m | |
| Big Trench-Ice Rink System Big Trench Entrance | 0 m | |
| Curly Creek Cave | 0 m | |
| Dry Creek Cave | 0 m | |
| Fish Hatchery Cave | 0 m | |
| Ice Cave | 0 m | |
| Lake Cave | 0 m | |
| Little Red River Cave | 0 m | |
| Nielsen's Cave | 0 m | |
| Slime Cave | 0 m | |
| Ape Cave |