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MapSpeciesParksDiving
  1. Home
  2. Diving and snorkelling
  3. Belize
  4. Great Blue Hole
SinkholeUNESCO World HeritageMarine Protected Area

Great Blue Hole

Near Great Blue Hole

Depth: 0–124 mLevel: AdvancedApril-June
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A cave whose roof collapsed millennia ago and which then flooded. It forms an almost perfect circle some 300 m across at the surface and drops vertically to around 124-125 m. Recreational diving reaches 40 m, the depth at which the stalactites appear: the largest formations of their kind ever found underwater.

Depth

0–124 m

Recommended level

Advanced

Average visibility

30 m

Protection status

Natural monument within the Belize Barrier Reef Reserve System

UNESCO designation

World Heritage Site (Belize Barrier Reef Reserve System, inscribed on 4 December 1996, with seven marine protected areas)

Did you know?

It was made famous by the visit of Cousteau's Calypso in 1970, and it was given its name by the British writer and diver Ned Middleton. It is a dive for the thrill, not for the wildlife: below 30 m narcosis is a real risk and the site has claimed lives. Belize has three of the only four true coral atolls in the western hemisphere: Lighthouse Reef, Turneffe and Glover's Reef. The property was on the List of World Heritage in Danger between 2009 and 2018; it was removed after Belize passed a moratorium banning oil exploration throughout its maritime zone.

Sources consulted: Wikipedia (Half Moon Caye / Lighthouse Reef) · Hamanasi · Toucan Discovery · belizehub.com · williamdrumm.com

Location

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1 park within 30 km.

Great Blue Hole: 36 documented species

Ecosystem

Cave / cenote

Nearby parks

What is there to see on land, near this site?

1 km away

Similar dive sites

Which other dive sites are like this one?

Same country: Belize

Same country: Belize

Same country: Belize

Keep exploring

Based on what we already know about this dive site.

Share your experience diving or snorkelling at Great Blue Hole.

Water temperature

27 °C

Current

Weak

Access

Liveaboard/Boat

Best season

April-June

Route duration

2–3 days

Recommended certification

Deep Diver

Approx. price

200 USD / dive

Plan your dive

Best season
April-June
Route duration
2–3 days
Approx. price
200 USD / dive
See location

Same country: Belize

Belize · Lighthouse Reef
See on the interactive map→
Common Sea FanNot Evaluated

Common Sea Fan

Gorgonia ventalina

Great BarracudaLeast Concern

Great Barracuda

Sphyraena barracuda

Blue CrabNot Evaluated

Blue Crab

Callinectes sapidus

Great Land CrabNot Evaluated

Great Land Crab

Cardisoma guanhumi

Atlantic Ghost CrabNot Evaluated

Atlantic Ghost Crab

Ocypode quadrata

Portuguese Man-of-warNot Evaluated

Portuguese Man-of-war

Physalia physalis

Queen ConchNot Evaluated

Queen Conch

Lobatus gigas

Spotted Eagle RayEndangered

Spotted Eagle Ray

Aetobatus narinari

Grooved Brain CoralCritically Endangered

Grooved Brain Coral

Diploria labyrinthiformis

Elkhorn CoralCritically Endangered

Elkhorn Coral

Acropora palmata

Staghorn CoralCritically Endangered

Staghorn Coral

Acropora cervicornis

Branching Fire CoralNot Evaluated

Branching Fire Coral

Millepora alcicornis

See all 36 species found here

Great Blue Hole

Secondary sinkhole

Blue Hole (Turneffe)

Belize

Up to 40 m · Advanced

Reef sharks · groupers

See dive site
Reef cut/Reserve

Hol Chan Marine Reserve

Belize

Up to 20 m · Open Water

Nurse sharks · eagle rays

See dive site
UNESCO
Atoll

Glover's Reef

Belize

Up to 35 m · Advanced Open Water

Reef sharks · groupers

See dive site
ParkGreat Blue Hole1 km away
CountryBelize
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Nearby park (1 km away)Great Blue Hole
More places in Belize
UNESCO
Wall

Half Moon Caye Wall

Belize

Up to 40 m · Advanced Open Water

A wall dropping more than 1 · 000 m; green

See dive site
World Heritage
Marine protected area