Blue Hole8 sites6 countries

Dive sites: Blue Hole

Blue Hole dive sites — depth, conditions, and required training level.

Bahamas

Andros Blue Holes

Fresh Creek · Andros Island · Bahamas

Andros Island contains the world's highest concentration of blue holes, both inland and oceanic, offering exploration of vertical shafts and horizontal cave passages through ancient Bahamian limestone.

Dean's Blue Hole

Clarence Town · Long Island · Bahamas

The world's deepest known saltwater blue hole at 202 metres, set in a turquoise bay surrounded by cliffs.

Nassau Blue Hole (Tongue of the Ocean)

Nassau · New Providence · Bahamas

An oceanic blue hole on the edge of the Tongue of the Ocean abyss near Nassau, where the Bahamian shelf drops from shallow coral gardens into a 2,000-metre deep trench attracting sharks, eagle rays, and pelagic species.

Belize

cave

Great Blue Hole

Belize City · Lighthouse Reef Atoll · Belize

A massive marine sinkhole plunging 124 meters deep, adorned with ancient stalactites and patrolled by Caribbean reef sharks.

Greece

reef

Zakynthos - Navagio Area

Zakynthos Town · Ionian Islands · Greece

Diving beneath the towering white cliffs of Shipwreck Beach on Zakynthos, exploring underwater caves, blue holes, and Mediterranean reef teeming with life.

Malta

reef

Blue Hole (Gozo)

Dwejra, Gozo · Gozo · Malta

A natural vertical chimney in the limestone coast of Gozo that drops to a stunning underwater arch at 15 metres before opening to a dramatic wall plunging into the deep blue.

Philippines

wall

Romblon Island Blue Hole

Romblon Town · Mimaropa · Philippines

A deep vertical sinkhole in the coral wall off Romblon Island where marble-white limestone creates dramatic light effects, resident whitetip sharks circle the shaft, and surrounding reefs harbor rare pygmy seahorses and nudibranchs.

Taiwan

reef

Orchid Island (Lanyu)

Taitung · Taitung County · Taiwan

Taiwan's wildest dive frontier with 30-50 metre visibility, deep blue holes, massive sea fans, and the indigenous Tao culture providing a unique cultural dimension.