Mallorca
Cala sa Nau (Mariengrotte)
- Max depth18 m
- CertificationOpen water / no overhead
Diving and fills
Dive here with
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Fills nearby
- Skualo Porto CristoUnknown — ask about fills (air/nitrox); no trimix mentioned
- ZOEA MallorcaNot stated — ask
- Bluewater MenorcaAir (per its SSI listing); nitrox: ask
The dive
Along a slightly overhanging rock wall you find a large, dark opening. Beyond it the cave is spacious, with stalactites and stalagmites, and inside you see air above the water.
Profile and sections
Along a slightly overhanging rock wall you find a large, dark opening. Beyond it the cave is spacious, with stalactites and stalagmites, and inside you see air above the water. Colour fades quickly past the entrance, and it is dark.
German-speaking divers call it the Mariengrotte; Divebooker describes a stalactite cave with a large opening at the top.
Practical: East Coast Divers rates the dive 'medium' and a drift dive.
- Depth and profile
- Average -8 m, max -18 m (East Coast Divers); Divebooker gives max -13 m. Inside there is 4–6 m of water. Cave ~80 m long and ~30 m wide (Divebooker).
- Configuration
- All configurations (estimate): a spacious cave with a large entrance.
- DPV: Not DPV-suitable (estimate)
- Short sea cave.
Who can dive where
- At least Open water / no overhead
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 18 m (trimix or deco may be needed)
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Boat dive with East Coast Divers from Portocolom (Oct 2026), at least Advanced Open Water; the dive stays in zone 1, the cavern zone; divers also describe an entry from the beach at Cala sa Nau, south of Portocolom.
Around Cala sa Nau (Mariengrotte)
Fills3 fill stations · nearest 0 km
Skualo Porto Cristo
Passeig des Cap des Toll 11, 07680 Porto Cristo
Unknown — ask about fills (air/nitrox); no trimix mentioned
Ask
PADI 5-star centre in the reference town; boat dives and boat trips to the Cova des Coloms sea cave. No tec or cave-diving offer found.
ZOEA Mallorca
Club Nàutic Santa Ponsa, Santa Ponsa (also Via Creu 46, 07180, Palma)
Not stated — ask
1 Apr–31 Oct daily; 1 Nov–31 Mar weekends and holidays only
Large centre in the south-west; daily boats to >30 sites, incl. the El Toro, Malgrats and Dragonera reserves (Cueva de la Ventana). Handy if you stay on the west side.
Bluewater Menorca
Carrer Llevant, local 1-3, 07769 Cap d'Artrutx (Ciutadella)
Air (per its SSI listing); nitrox: ask
Website: daily 8:00–18:00; SSI: Mon–Sat 8:30–18:00
Own boat from Cala'n Bosch; guided dives in Pont d'en Gil (~40 min by boat). Freediving too.
Drive times from Porto Cristo: we don't know this site's exact spot.
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