After an important conservation and enhancement project, this natural wonder is now open to visitors, revealing all its extraordinary beauty.
A 200-million-year-old cave
This karstic cave was formed in limestone rocks dating back an astonishing 200 million years. Its walls feature stalactites and stalagmites up to 12 meters high, covered with natural deposits.
At the bottom of the cave lies a small brackish water lake, which reflects a soft light, creating a fascinating green glow.
This water now covers areas that were once dry and inhabited by prehistoric humans, as proven by the ancient engravings found inside.
Restoration and improved accessibility
The external 126-step concrete staircase has been fully restored and now features a non-slip surface and handrails. The old wooden fencing along the pedestrian path parallel to the provincial road has also been replaced.
These upgrades have made the site safer and more accessible, enhanced by energy-efficient LED lighting.
Inside the cave, a 270-meter walkway made of stainless steel has been installed, with handrails on both sides and a perforated metal floor made up of approximately 356 steps.
The internal LED lighting system uses low-heat emission to minimize energy consumption and preserve the cave’s delicate microclimate.
Visiting the Green Cave of Alghero
An enchanting journey into the heart of the Earth
There’s nothing more fascinating than the mystery and hidden beauty found beneath the Earth’s surface.
The Green Cave of Alghero, nestled along the stunning Sardinian coastline, offers an unforgettable experience to anyone wishing to explore the island’s underground wonders.
Its natural formations — stalactites, stalagmites, small lakes, and green light effects — make it one of the island’s geological gems.
Whether you’re planning a visit or simply curious, this guide includes all the essential information: tickets, opening hours, booking details, and practical advice.
Description of the Green Cave
Located along the cliffs of Capo Caccia, the Green Cave owes its name to the emerald light reflections created by sunlight filtering through the limestone rocks and water.
This natural phenomenon produces a magical atmosphere inside the cave, making it one of the most captivating destinations in Sardinia.
During the guided tour, professional guides explain the cave’s geological history and natural significance.
Walkways and illuminated passages allow visitors to explore its hidden corners and admire up close the millennia-old rock formations — a unique experience not to be missed.
How to reach the Green Cave of Alghero
Shuttle service to Capo Caccia
Imagine boarding a scenic shuttle from Mugoni Beach to Capo Caccia, gateway to both Neptune’s Cave and the mysterious Green Cave.
The service runs every hour from 8:00 a.m. to 8:00 p.m., departing from the free parking area next to the beach along the SP55 road.
The round-trip fare is €5 (free for children up to 3 years old) and can be purchased directly onboard — no booking needed.
Choosing the shuttle is also an eco-friendly way to enjoy the landscape responsibly within the Porto Conte Natural Park.
By bus
Two main bus lines connect Alghero with Capo Caccia:
- ARST Line 9321 (year-round): departs from Via Catalogna, Alghero – travel time approx. 50 minutes.
- Private BEACHBUS – Cattogno Viaggi (May to September): details on www.cattognobus.it.
By taxi or private transfer
For a faster and more comfortable option, you can take a taxi or book a private transfer.
Please note that parking is not allowed along the last stretch of the SP55 road: you may only stop briefly to drop off or pick up passengers.
Visiting the Green Cave: opening hours, tickets, and practical tips
Visiting the Green Cave of Alghero is a unique experience that immerses you in one of Sardinia’s most fascinating natural sites.
Here’s everything you need to know before your visit: opening times, tickets, booking methods, and useful advice.
Opening hours and tour information
Guided tours take place in small groups of up to 30 people.
Each tour lasts about one hour and includes explanations from the expert guides of the Porto Conte Park.
Tour times:
- Morning: 9:00 – 10:00 – 11:00 – 12:00
- Afternoon: 14:00 – 15:00 – 16:00 – 17:00
Please arrive 15 minutes before your scheduled visit. The cave is open daily until October 30.
Tickets and booking
Access to the Green Cave requires the Full EcoMuseum Pass, an annual ticket that also grants entry to the other six cultural and natural sites of the Porto Conte Park. Advance booking is mandatory.
Ticket prices:
- Adults: €14
- Children (0–3 years): free
- Children (4–13 years): reduced €3
How to book:
- Online: tellingstones.com/porto-conte-tickets
- Via App: download the official EcoMuseum App and book directly from your smartphone
- On-site: at the ticket offices of any EcoMuseum attraction in the Porto Conte Park
Book early to secure your spot and enjoy a seamless experience!
Where to stay
Book your stay at B&B Bonsai Alghero to enjoy the exclusive experience of visiting the Green Cave, a unique opportunity to discover the unspoiled beauty of this extraordinary natural site.