Pozo Azul
Survey reports
| Length | Max depth | Entrances | Source | Date |
|---|---|---|---|---|
| 14,415 m | 126 m | Unknown | Cave-Exploring World Long Caves Secondary source Provided by: Jose Luis Membrado e-mail | 2025-12-01 |
| 13,775 m | 71 m | Unknown | Grandes Cavidades Submarinas de España Tertiary / aggregate source Provided by: Grupo Edelweiss Espeleobuceo en Burgos ( R. García) | Unknown |