Cathedral Cave (Gozo)
Also known as: Blue Dome, Cathedral Cave, Wied il-Għasri
A wide, air-domed cavern at Wied il-Għasri on Gozo's north coast, known as the 'Blue Dome' for the blue light where divers surface inside.
Last updated October 2026
The dive
A boulder slope rises toward light from somewhere above, and then you're through: a wide, mushroom-shaped opening between 5 and 18m gives way to a dome-shaped air pocket, and you surface inside what looks like a lit swimming pool. The boulders lining the slope up are covered in algae, sea urchins and starfish. Two shore routes reach the site: down roughly 100 steps and across pebbles at Wied il-Għasri, then a surface swim before descending along a wall through 12, 16 and 18m to the boulder field; or, in summer, a ladder at the neighbouring Għar il-Qamħ and a swim west along the cliff. Go in the afternoon if you can. The cavern mouth faces west, and afternoon sun turns the water inside a genuine, photographable blue.
What makes it special
Cathedral Cave's dome is the point of the dive: divers surface inside a huge air pocket with a ceiling around 15m above the water, lit blue by sunlight bouncing so close to the entrance that it reads as a swimming pool from underneath. Once inside, you can remove your regulator and talk. The acoustics carry, and more than one visitor has tried singing. That sociability, as much as the light, is what people come back for: a genuinely overhead dive that stays easygoing and unhurried, paced for photographs more than for nerve.
Know before you go
The dive itself is easier than getting to it. Both shore routes involve a real walk: steps and pebbles at Wied il-Għasri, or a ladder and a cliffside swim in summer at the neighbouring entry point. Pace yourself and save some energy for the surface swim before you descend. A wide-angle setup rewards the light and the diver silhouettes against the dome, and a torch helps pick out the corals and sponges lining the cavern's walls. If shore access looks like too much on the day, the 30-minute boat ride from Xlendi Bay reaches the same site without the walk.
Why Dive Cathedral Cave (Gozo)
What makes this dive site stand out.
- The Blue Dome
A wide air pocket lit blue by sunlight near the entrance, big enough to surface inside
- Wide, bright entrance
Opening 5-18m, letting in more light than a typical overhead entry
- Sociable air pocket
Divers can remove regulators, talk, and hear the acoustics inside the dome
- Two shore routes plus a boat option
Wied il-Għasri steps, a summer ladder nearby, or a 30-minute boat ride from Xlendi
Depth & Profile
Location
36.0814°N, 14.2301°E
Conditions & difficulty
Calmest seas across Gozo's north coast; the site's own timing note is about time of day, not season
Open Water is usually enough for the cavern itself, with the caveat that overhead-environment comfort and solid buoyancy control still matter. Malta also requires a licensed instructor in the water for anyone diving without a certification rated to at least 30m, so unguided buddy diving on the deeper approach needs that rating.
Summary
Easy to intermediate: the entrance and dome suit a comfortable Open Water diver, while the boulder-field approach and deeper reef sections extend the ceiling for those who go further.
Safety considerations
What can go wrong here, and what divers do about it. Conditions change - take the briefing from the operator on the day.
- Access and entry: The shore approach is more demanding than the dive itself: around 100 steps down, a pebble walk, then a surface swim before the descentPace the walk in and save some energy for the surface swim before you descend
Marine Life
Rules and permits
Frequently Asked Questions
Is Cathedral Cave suitable for beginners?▾
It's rated easy to moderate, not strictly a beginner-only site: Open Water certification is usually enough for the entrance and dome, but overhead-environment comfort and solid buoyancy control still matter, and the boulder-field approach can take you deeper if you follow it further.
What is the 'Blue Dome,' and why is Cathedral Cave called that?▾
The Blue Dome is the air pocket inside the cavern, where divers surface into what looks like a large lit pool. The blue colour comes from sunlight reflecting off the water so close to the entrance, an effect that's strongest in the afternoon.
Is Cathedral Cave the same as Billinghurst Cave?▾
No. They're Gozo's two marquee overhead-environment dives but sit on different stretches of the north coast and feel nothing alike: Cathedral Cave is bright, wide and sociable, while Billinghurst Cave is a longer, darker passage rated harder overall.
Can you dive Cathedral Cave from shore, or do you need a boat?▾
Both work. From shore, descend via Wied il-Għasri (about 100 steps, a pebble walk, then a surface swim) or, in summer, a ladder at the neighbouring Għar il-Qamħ followed by a swim along the cliff. Most centres instead run it as a 30-minute boat ride from Xlendi Bay.
What time of day is best to see the light effect inside?▾
Afternoon. The cavern mouth faces west, so afternoon sun produces the strongest blue-dome lighting; mornings are noticeably darker inside.
Did a clockmaker's salt-pan disaster really happen at Cathedral Cave?▾
A well-known Gozo legend from 1773 tells of a clockmaker who dug shafts from clifftop salt-pans into a sea cave, and the following storm season drove water back up through them as a geyser that ruined nearby crops. The story is sometimes told about this cave, but it is more usually placed at Reqqa Point, further along this stretch of coast, so treat it here as local legend, not this cave's own documented history.
Is Wied il-Għasri a protected area, the way the headland at Reqqa Point is?▾
Not established either way. Reqqa Point, a few kilometres along this coast, carries a confirmed Natura 2000 designation; Wied il-Għasri doesn't carry that same designation, and its protected-area status stays genuinely open rather than settled as unprotected. Diving here needs no permit or fee in the meantime.
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