The sea cave of stalactites and a salt lake at the foot of Capo Caccia.
Neptune's Grotto opens at the foot of the 110-meter cliffs of Capo Caccia, west of Alghero, in halls of stalactites and stalagmites around a lake of salt water. Half the event is getting there.
You can descend the Escala del Cabirol, the Goat's Stairway of 654 steps cut into the rock face above the open sea, or arrive by boat from Alghero harbor and step straight onto the landing. A guided walk leads through the chambers, so leave time for the stairs or the boat on top of the visit itself.
If you see nothing else, see these.
A 654-step staircase cut into the cliff above the sea, part of the experience.Capo Caccia cliff
An underground salt lake about 100 meters long.Main chamber
Calcite columns that reach about 18 meters high.Inside the cave
A balcony-like formation over the main lake.Above the lake
Everything you need before you go.
Ages 6 to 17, students to 26 and Alghero residents €10; groups of 25 or more €12. Free for under-6s and disabled visitors with a carer. The ticket does not include the shuttle bus or the boat. Last updated September 2026. Prices change, so check the official site before you go.
Arrive at the Escala meeting point well before your slot, since late arrivals lose the reservation. Book your slot online first; the ticket office is not always open on site.
About two hours, counting the stairs or the boat plus the guided walk. The cave tour itself is shorter.
Yes for visits by land, where booking a time slot is always mandatory. Boat trips depend on sea conditions.
The 654 steps are manageable but tiring, especially on the way back up. The boat is easier but depends on calm seas; shoulder seasons are gentler.
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