Old Bellamy
Aliases: Derekson, Santa Fe River Rise
Survey reports
| Length | Max depth | Entrances | Source | Date |
|---|---|---|---|---|
| 12,657.5 m | 48.8 m | Unknown | Cave-Exploring World Long Caves Tertiary / aggregate source Provided by: Die langsten Unterwasserhohlensysteme der welt, Oliver Knab | 2016-06-01 |