Calçada do Gigante
Also known as: Calçada de Giante
A wall of vertical basalt prisms off Santa Maria, Azores, named for Ireland's Giant's Causeway, running 15-30m with shoals of groupers and triggerfish.
Last updated September 2026
The dive
A wall of vertical basalt prisms forms this site's structure, columnar rock in the same geological family as Ireland's Giant's Causeway, which gives the site its name. Boat access from Vila do Porto marina is the only way to reach it, and the wall runs from about 15 metres at its shallowest down to a base near 30. Groupers move in loose shoals along the columns, with grey triggerfish working the same stretch of rock. Current stays light throughout, holding the dive to a steady pace.
What makes it special
The comparison that gives this site its name holds underwater too: a single run of columnar basalt, unbroken from the wall's top to its base near 30 metres. On Santa Maria's roster of boat dives, this wall sits between the calmer nearshore reefs and the longer offshore crossings. The current runs light for most of the dive, so a wall averaging past 20 metres stays within reach of an Advanced Open Water diver and not just a technical one.
Know before you go
Calçada do Gigante sits outside Santa Maria's four regulated marine reserves, so no permit, fee or fixed booking slot applies to a dive here. Depth, not the current, is why Advanced Open Water is the working certification: the wall's average stretch runs past 20 metres.
Why Dive Calçada do Gigante
What makes this dive site stand out.
- Columnar basalt wall
Vertical basalt prisms, the same geology as Ireland's Giant's Causeway
- 15-30m depth range
Average stretch runs past 20m, why Advanced Open Water is recommended
- Grouper and triggerfish shoals
The two species named most consistently along the wall
- Light current
Little current keeps the wall a steady dive despite the depth
- Outside the area's reserves
Not one of Santa Maria's four regulated marine reserves
Depth & Profile
Conditions & difficulty
Boat operations across the area run May-October.
Recommended because the wall's average stretch runs past 20 metres; the site does not exceed the 30-metre ceiling Advanced Open Water authorises.
The depth, not the current, sets the grade: the current itself stays light throughout.
Marine Life
Rules and permits
Frequently Asked Questions
Is the dive site the same place as the Calçada do Gigante waterfall on land?▾
They share a name and the same basalt-column geology, tall prismatic volcanic rock split into vertical columns. The land feature is a coastal waterfall and outcrop at Ribeira do Maloás, near Santo Espírito, on Santa Maria's south coast; the dive site is reached by boat from Vila do Porto. Whether the two are the same formation continuing underwater, two separate outcrops that share a name and a geological family by coincidence, or something else again is an open question.
Why do some listings spell it 'Calçada de Giante' instead of 'Calçada do Gigante'?▾
One operator's own site uses 'Calçada de Giante'; every other listing, and the more consistently used form, spells it 'Calçada do Gigante'. Both names point to the same dive.
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