Tanna Blue Holes & Blue Cave

About this site

Tanna offers some of Vanuatu's most spectacular and unique diving with its famous Blue Holes and Blue Cave. A labyrinth of interconnected lava tubes, tunnels, and caverns lit by shafts of sunlight creates an otherworldly diving experience. The Blue Cave features a cathedral-like chamber where sunlight streams through a hole in the ceiling onto an iridescent lagoon below.

Conditions

Country

Vanuatu

Region

Tanna Island

Max depth

5–25 m

Visibility

20–40 m

Water temperature

24–28°C

Difficulty

Intermediate

Best season

Year-round; April to October best

Type

Cave

Suitable for

• Scuba

Dive types

• Cave
• Reef

Marine life

• Sharks
• Turtles
• Coral
• Eels