Great Blue Hole

A near-circular sinkhole 318m across and 124m deep near the centre of Lighthouse Reef. The dive drops to about 40m along a wall to a limestone overhang hung with stalactites that formed when the cave was dry, tens of thousands of years ago. Bottom time is short and the water below the overhang is dark and low on life. Sharks patrolling the depths are the main animal encounter.

Depth

0–40m

Current

None

Diver level

Advanced open water

Entry

Boat

Unique features

Ancient stalactites on a submerged overhang around 40m (130ft)
Sparse life; a few Caribbean reef sharks and occasional bull sharks
Deep, dark, short-bottom-time novelty dive rather than a reef dive

Sources & last checked

Checked July 2026

This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.

Great Blue Hole — Wikipedia
Great Blue Hole Scuba Diving — Dive The World
Belize Blue Hole: is it really worth it? — Meet Me In Departures

Note on the data: Coordinates are approximate; not surveyed dive-site GPS.