The Grotte di Nettuno (Neptune's Grotto) is a stalactite cave near Alghero in the metropolitan city of Sassari on the Italian island of Sardinia, near Capo Caccia, around which a maritime protected area extends.

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Peter

March 1, 2025

The grotto is one meter above sea level at the foot of a 110 meter high steep rock face and can only be visited when the sea is calm. It can be reached via a staircase with 654 steps in the almost vertical cliff, the Escala del Cabirol (German: deer ladder). Alternatively, you can take a less strenuous boat tour from Alghero or a nearby car park.

Only a few hundred meters of the extensive, approximately four-kilometer-long cave system are accessible to the public. As part of a guided tour, you can view stalactite formations, calcareous sinter deposits and a small, approximately 120-meter-long saltwater lake that is connected to the sea. Explanations are given via permanently installed loudspeakers in Italian, English and German.

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Elevation 10 m

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Location: L'Alguer/Alghero, Tàtari/Sassari, Sardinia, Italy

Escala del Cabirol (Stairway to Neptune's Grotto)

1. Excellent bicycle path – Cala Dragunara loop from Porto Torres

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