Ffynnon Sion Sieffre
(Blaenau Gwent - GB)
51.798717,-3.268103
51.798717,-3.268103
Caves nearby
| Distance (km) | Name | Length (m) | Depth (m) |
|---|---|---|---|
| 8.6 | Ogof y Daren Cilau | 27000 | 192 |
| 19.8 | Porth yr Ogof cave | 2530 | 60 |
| 44.7 | Gloucester Hole | ||
| 45.6 | Slaughter Stream Cave | 13000 | 100 |
| 172.7 | Thor's Cave | ||
| 181.4 | Bossen Hole | ||
| 185.1 | Poole's Cavern | ||
| 187.2 | Great Rutland Cavern | ||
| 195.7 | Eldon Hole | 200 | 85 |
| 195.7 | Little Bull Pit |