Discover the Green Cave of Alghero: a spectacular cave where nature, archaeology and history meet in the Capo Caccia promontory. Useful information to help you plan your visit.

Green Cave of Alghero: A Hidden Treasure Between Nature and History

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Caves of Alghero
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Less well known than the famous Neptune’s Grotto, the Green Cave is one of the most fascinating places in the Capo Caccia promontory. Following an important restoration and enhancement project, this extraordinary cave is once again open to visitors, offering the opportunity to discover one of the most interesting natural and archaeological sites in Sardinia.

The route takes you through impressive limestone formations, fascinating plays of light, small underground pools and valuable evidence of prehistoric human presence, offering an experience that is quite different from the other caves in the area.

Would you like to discover all the caves in the promontory? Explore our guide to the Caves of Alghero.

A 200-Million-Year-Old Cave

The Green Cave formed within the limestone rocks of Capo Caccia around 200 million years ago, as the slow action of water carved out tunnels and large underground chambers.

During the visit, you can admire stalactites and stalagmites up to 12 metres high, shaped over millions of years, as well as a fascinating brackish-water pool that reflects a distinctive green light. This natural phenomenon is what gave the cave its name.

The cave still maintains a delicate natural balance, which is protected through guided tours and controlled access.

An Important Archaeological Site in Sardinia

The Green Cave is not only a geological gem. It is also one of the most important archaeological sites in north-western Sardinia.

Research has uncovered graffiti and evidence dating back to the Neolithic period, showing that these caves were visited by humans thousands of years ago, when some areas that are now submerged were still completely dry.

This combination of natural heritage and prehistoric evidence makes the Green Cave a unique destination, offering an insight not only into the history of the Earth but also into the history of the earliest communities that inhabited the Alghero area.

The New Visitor Route

The restoration works have made the Green Cave accessible again while ensuring full respect for the surrounding environment.

The historic 126-step outdoor staircase has been restored with new handrails and anti-slip systems, while the access path has been completely upgraded.

Inside the cave, a route of approximately 270 metres has been created, featuring stainless-steel walkways with safety railings and a modern, low-impact LED lighting system designed to preserve the cave’s delicate microclimate.

Thanks to these improvements, visitors can now explore the cave safely without altering its natural characteristics.

What to See During the Visit

The guided tour allows visitors to admire the spectacular limestone formations up close, the large underground chambers and the fascinating underground pool reflecting the cave’s characteristic green light.

Along the route, the guides explain how the cave was formed, highlight its geological features and illustrate the importance of the archaeological finds discovered at the site, making the visit engaging from both a natural and historical perspective.

Lasting approximately one hour, the route is an ideal experience for anyone wishing to discover one of the lesser-known corners of Capo Caccia.

Opening Hours, Tickets and Reservations

The Green Cave can only be visited as part of guided tours organised by the Parco di Porto Conte.

Access is limited to small groups and requires a reservation.

Entry is included in the Full EcoMuseo Pass, which also allows visitors to explore the other sites belonging to the EcoMuseo of Parco di Porto Conte.

Since opening hours, prices and access arrangements may change throughout the year, it is advisable to check the official channels before your visit.

How to Reach the Green Cave

The Green Cave is located within the Capo Caccia promontory, approximately 24 kilometres from Alghero.

The most convenient way to reach it is by using the shuttle bus connecting the free car park in Mugoni with Capo Caccia, which operates during the tourist season.

Alternatively, you can arrive by regular bus services or by taxi and private transfer services. In the final section of the provincial road, parking is not permitted, except for the time needed to pick up or drop off passengers.

To plan your visit and find out more about the promontory, also take a look at our dedicated guide to Capo Caccia.

Tips for Your Visit

When visiting the Green Cave, comfortable shoes with non-slip soles are recommended. It is also advisable to bring a light jacket, as the temperature inside the cave is cooler than outside.

It is important to respect the environment by avoiding contact with the limestone formations and always following the guides’ instructions. In this way, visitors can help preserve this extraordinary natural heritage.

Where to Stay When Visiting the Green Cave

The Green Cave is one of the most fascinating experiences to enjoy during a stay in Alghero.

From B&B Bonsai Alghero, you can easily reach Capo Caccia and combine your visit with the other attractions of the Riviera del Corallo, while also receiving useful advice to help you plan your itinerary.

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This page on accessibility was last updated on June 25, 2025.