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Sawmill Sink

Abaco

Sawmill Sink

Closed to divers

Not on your own: only with a permit and a guide. Off limits to divers: according to Brian Kakuk (Bahamas Caves Research Foundation) these caves are off limits to divers, and anyone who tries to dive them risks arrest (November 2026).

Source: Brian Kakuk (Bahamas Caves Research Foundation), e-mail November 2026 ↗Source: Nitrox (IANTD) nr. 10 – Bahamas caves: a great example of conservation, Luis Sánchez, aug 2026 ↗
  • CertificationFull cave
  • SpecialExperienced divers
Directions

Diving and fills

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Now at Sawmill Sink

Status
Closed

What it looks like

All 1 videos and posts

Videos and posts

From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.

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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.

The dive

Sawmill Sink is an inland blue hole leading into cave passages. Rails and saw blades from the logging era still lie around the hole.

Below the bacterial layer (~-9 to -11 m) lies hydrogen sulphide (H₂S), toxic to most organisms.
Source: National Geographic – Deep Dark Secrets, aug 2010 ↗Source: Wikipedia – Blue hole ↗
Profile and sections

Sawmill Sink is an inland blue hole leading into cave passages. Rails and saw blades from the logging era still lie around the hole.

It is a fossil site (2004 according to Friends of the Environment, 2005 according to Wikipedia): remains of >50 Cuban crocodiles and 13 land tortoises (2 new species), including a crocodile skull more than 3,000 years old. The anoxic water below the halocline preserves bones and plants. The museum that opened in 2018 with these finds was lost to Hurricane Dorian in 2019.

Depth and profile
Bacterial layer ~-9 to -11 m, below it H₂S and anoxic salt water · side passages >600 m along the halocline
Configuration
Unknown; sidemount is used in the South Abaco caves.
DPV: unknown
No data
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveConfiguration unknown — research beforehand · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Experienced diversPermission neededThrough a dive centre or guide

This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.

How to get there

Along old logging tracks in the pine forest (~30 min south of Marsh Harbour, near the Delphi Club), then a paved path. Wooden steps and a swimming platform. Swimming is allowed.

Plan your route ↗

Around Sawmill Sink

FillsNo fill station known nearby
Caves nearby5

No provider in Abaco yet

The caves here are listed as information only: we don't know a dive centre, guide or club yet that takes visitors, so you can't plan a trip here yet. Do you know one, or are you one? Let us know.

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Something wrong, or do you know more?Depth, access, parking, the current situation: let us know.
Sources, sharing and disclaimer

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Bahamas Underground, InDepth 2026, Nitrox (IANTD) 2026, Scuba Diving, Advanced Diver Magazine, Blue World TV, National Geographic 2010, DAN Alert Diver, Florida Museum, Friends of the Environment, Rolling Harbour Abaco, Abaco Sun, Royal Bahamas Police Force, Get Ready Bahamas, DeeperBlue, Wikipedia; Sept 2026; reef dives: Out Islands of the Bahamas, Oct 2026). In November 2026 Brian Kakuk (Bahamas Caves Research Foundation) wrote that the caves are off limits to divers. No Abaco cave has a public entrance coordinate — pins are missing on purpose; ~ = estimate. Rules and access change — check locally.