Upper Blackhole
(Swansea - GB)
51.547775,-4.247992
51.547775,-4.247992
Cavités proche
| Distance (km) | Nom | Longueur (m) | Profondeur (m) |
|---|---|---|---|
| 55.4 | Porth yr Ogof cave | 2530 | 60 |
| 81.7 | Ogof y Daren Cilau | 27000 | 192 |
| 106.3 | Rod's Pot | 188 | 45 |
| 106.6 | Aveline's Hole | 67 | 16 |
| 106.6 | Sidcot Swallet | 200 | 28 |
| 106.7 | Goatchurch Cavern | 750 | 55 |
| 107.3 | GB Cave | 1950 | 134 |
| 108.3 | Longwood Swallet | 1650 | 175 |
| 109.7 | Gloucester Hole | ||
| 110.2 | Upper Flood Swallet | 3200 | 110 |