Grotta di Nettuno

Travelers visiting Olbia should be aware that the Grotta di Nettuno (Neptune’s Cave) is not located in Olbia. The provided research indicates that this famous stalactite sea cave is situated near Alghero, on the northwest coast of Sardinia, approximately 60 kilometers from Olbia. It is a popular tourist attraction discovered by local fishermen in the 18th century and named after the Roman god of the sea. The cave features a total length of 4,000 meters, with 500 meters designated as a public show cave that opened in 1959.

The entrance is located at the foot of the 110-meter high Capo Caccia cliffs, approximately 1 meter above sea level. Visitors can reach the cave via the "Escala del Cabirol," a 654-step stairway cut into the cliff in 1954, or by taking a boat trip from the port of Alghero. Boat trips run hourly in summer and less frequently in spring and autumn. The cave entrance is only accessible when sea conditions are calm.

Admission fees vary by season and visitor category. The full price is €18.00, with reduced rates for groups, students, and residents. Free admission applies to children under 6, people with disabilities, and licensed tour guides. Tickets can be purchased online or at ticket offices in Alghero. For those staying in Olbia, a day trip to Alghero is a rewarding excursion that showcases the natural beauty of Sardinia’s northwest coast. Exploring the Grotta di Nettuno provides a profound insight into the geological heritage of the region.