Fuente Azul
Hortigüela - Burgos, Castilla León, Spain
Survey reports
| Length | Max depth | Entrances | Source | Date |
|---|---|---|---|---|
| 490 m | 135 m | Unknown | Grandes Cavidades Submarinas de España Tertiary / aggregate source Provided by: Espeleobuceo en Burgos 2008 ( R. García) | Unknown |