Discover Neptune's Grotto in Alghero: how to get there, what to see, timetables, prices and useful advice. An unmissable excursion to experience with Nautika Suites.

A hidden treasure of Sardinia

If you dream of a holiday amid unspoilt nature, crystal-clear sea and underground wonders, you cannot miss a visit to the Grotta di Nettuno, one of the most spectacular sea caves in Italy. Located inside the Capo Caccia promontory, near Alghero, this cave enchants thousands of visitors every year with its breathtaking landscapes, thousand-year-old stalactites and fascinating history.

In this comprehensive guide you will discover everything you need to know about visiting Neptune's Cave: how to get there, what to see, useful tips and why to choose Nautika Suites as the starting point for a perfect excursion.

Where Neptune's Cave is located

A jewel among the cliffs of Capo Caccia

The Grotta di Nettuno (Neptune's Cave) is located within the Marine Protected Area of Capo Caccia - Isola Piana, about 24 km from Alghero, in the north-western part of Sardinia. The landscape here is simply extraordinary: high limestone cliffs plunge into the turquoise sea, and right at the base of these cliffs opens the entrance to the cave, like a secret door to another world.

The Capo Caccia area is also famous for its biodiversity and the presence of other underwater caves, such as the Grotta di Nereo (Nereus' Cave), much loved by divers.

How to get to Neptune's Cave

Two roads, two unforgettable experiences

There are two ways to reach Neptune's Cave, each with its own charm:

Inside Neptune's Cave: what to see

A world of stone and water

Once inside, you are immediately greeted by a fairytale atmosphere: the soft light, the sound of water and the rock formations create an almost surreal ambience.

The most fascinating spots:

Lake Lamarmora: one of the largest underground brackish lakes in Europe

Hall of Ruins: a huge hall dominated by stalagmites up to 2 metres high

Music Gallery: a natural balcony overlooking the lake

Smith Hall: named after the first English explorer who documented its beauty

The limestone formations

The stalactites and stalagmites in the cave have formed over millions of years, drop by drop, creating amazing columns, draperies and figures.

🖼️ Imagine: it feels like walking into a natural cathedral sculpted by nature's patience.

Practical advice for your visit

What to bring and how to dress

Comfortable shoes with non-slip soles

Light sweatshirt (indoor temperature: 16-18 °C even in summer)

Camera (no flash)

Water and light snacks if you are walking

Please note: access is not suitable for people with reduced mobility (especially by land). Prams must be left outside.

Why visit the Grotta di Nettuno

A unique experience in Sardinia

1. By sea (recommended)

The most convenient and suggestive solution is an excursion by boat from the port of Alghero, or from Porto Conte. On the way you can admire the coastline from a unique perspective, crossing hidden coves and rock formations sculpted by the wind and the sea.

Boat trip duration: approximately 30 minutes

Average price: €15 to €25 depending on the company and the period

2. By land (for the more adventurous)

If you love walking, you can access the cave via the spectacular Escala del Cabirol, a flight of 654 steps carved into the cliff face. The view is incredible, but the descent (and ascent!) requires a good level of fitness.

💡 Tip: if you suffer from vertigo or are travelling with small children, the sea option is preferable.

Timetables, tickets and useful information

Plan your visit

Open: all year round, subject to sea weather conditions

Hours: generally from 9:00 to 17:00 (extended until 19:00 in summer)

Guided tours: compulsory, in several languages

Price:

Full: approx. 14 €

Reduced price: 10 € (children, students, over 65)

Free for children under 6

Advance booking is recommended in high season. For up-to-date information: www.algheroturismo.eu

Neptune's Cave is much more than a tourist attraction: it is a journey into the depths of the earth, an opportunity to connect with nature, learn something new and take home an indelible memory.

Suitable for families, couples, geology enthusiasts or the simply curious, the cave represents one of the most fascinating excursions one can make in Alghero.

Where to stay: Nautika Suites, the perfect starting point

If you are planning your visit to Neptune's Cave, the ideal place to stay is Nautika Suites. Located in Alghero, in a strategic position between the old town and the beaches, Nautika offers:

7 double rooms and a Suite for 4 people

Elegant and well-kept rooms surrounded by greenery

Free parking and outdoor spaces for relaxation

Staff available to book excursions, boat trips and transfers

👉 In a few minutes you can reach Capo Caccia, the harbour or the famous Maria Pia beach.

Conclusion

The Grotta di Nettuno (Neptune's Cave) in Alghero is a place that conquers all: young and old, nature lovers or simple explorers. Its underground wonders, the stalactites sculpted by time and the grandeur of Capo Caccia create an experience that remains in the heart.

Whether you choose the boat excursion or the cliff-top staircase, this visit is an essential part of any holiday in Alghero.

Book your stay now