| name | discoverer | image | geology | type | Area (m²) | elevation (m) | Range | date discovered | Depth (m) | Height (m) | city | Website | administrative división | continent | Country | latitude (°) | Width (m) | Length (m) | longitude (°) | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Otter Hole | Karst | 60 | Saint Arvans | website | Wales | Europe | United Kingdom | 51.6500015259 | 3,352 | -2.6833333969 | Map |