Punyelroo Cave
| Punyelroo Cave | |
|---|---|
| Location | Punyelroo, South Australia, Australia |
| Coordinates | 34°35′39″S 139°36′40″E / 34.5943°S 139.6112°E |
| Length | 3 kilometres (1.86 mi) |
| Elevation | 8 metres (26 ft) |
| Geology | Miocene sandstone |
Punyelroo Cave is a horizontal solution cave extending for approximately three kilometres (1.86 mi) into a Miocene sandstone cliff on the banks of the Murray River in South Australia, five kilometres (3.11 mi) south of Swan Reach. It is the longest cave on the river system.