Neptune's Grotto

Neptune's Grotto is a large coastal cave near Alghero, Sardinia, known for limestone formations and access by boat or a cliffside staircase.

Capo Caccia: Capo Caccia is a limestone promontory on Sardinia’s northwestern coast near Alghero. The grotto opens at the base of this headland’s sheer cliffs.
Escala del Cabirol: Escala del Cabirol is a steep staircase carved into the cliffs of Capo Caccia in Sardinia. Its long descent provides the grotto’s landward entrance route.
Lake Lamarmora: Lake Lamarmora is a large saltwater lake inside Neptune's Grotto. The underground lake is a prominent feature of the cave’s interior.
Grotta Verde: Grotta Verde is a sea cave near Alghero, Sardinia, known for green light inside its chambers. It is a nearby coastal cave, but its illuminated interior differs from Neptune’s Grotto.
Karst: Karst is a landscape shaped by the dissolution of soluble rock, especially limestone. Dissolution of the headland’s limestone helped form the coastal cave.
Alghero: Alghero is a coastal city in northwestern Sardinia, Italy. The grotto lies near this city and is commonly visited from its coast.
King's Room: The King's Room is a chamber within Neptune's Grotto, named for its scale and ornamented formations. This chamber exemplifies the grotto’s spacious interior and limestone decoration.
Grotta di Nereo: Grotta di Nereo is a large underwater cave system beneath Capo Caccia in Sardinia. Unlike the grotto’s visitor-accessible chambers, it is chiefly known as a diving cave.
Limestone: Limestone is a sedimentary rock composed mainly of calcium carbonate. This soluble rock forms the grotto’s walls and sculpted interior.
Alghero–Fertilia Airport: Alghero–Fertilia Airport is an international airport serving northwestern Sardinia. It is a principal air gateway for visitors reaching the grotto area.

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