Neptune’s Grotto, or Grotta di Nettuno, is one of the classic day trips from Alghero, but first-time visitors face an important choice before they arrive: reach the cave by boat or descend the spectacular Escala del Cabirol, the 654-step staircase cut into the cliffs of Capo Caccia. Both routes lead to the same sea-level entrance, but the journey, physical effort and logistics are very different.
The cave is on the north-western side of the Capo Caccia promontory, around 25 kilometres by road from central Alghero. According to the official cave website, entry is possible only when weather and sea conditions are suitable, so visitors should check current operating information on the day rather than treating any booking as immune to the weather.
Option one: the 654 steps of the Escala del Cabirol
The overland route is the dramatic one. From the top of Capo Caccia, the Escala del Cabirol descends 654 steps along the limestone cliff to the entrance of the grotto. The views over the sea are a major part of the experience, but remember that after visiting the cave you have to climb those steps again.
The official visitor guidance recommends comfortable footwear and advises against flip-flops. Water, sun protection and a hat are sensible for the staircase, particularly in warm weather. The cave management specifically states that the stairway route is not recommended for people with certain heart conditions or respiratory failure, and the grotto is not accessible to people with total motor disabilities or wheelchair users.
There is an important summer change for drivers. From June through October, visitors arriving by car must use the designated parking system rather than simply driving to the cave entrance. The official instructions say to park free of charge at Casa Gioiosa one hour before the visit time and continue to Capo Caccia by shuttle. The shuttle is not included in the grotto admission ticket. From November through May, visitors can drive directly to the entrance forecourt and are asked to arrive at least 40 minutes before their reserved visit.
Travellers without a car can also reach the area using ARST public bus line 9321 from Alghero, which the cave website lists as operating throughout the year. A private Beach Bus service is also listed for the May-to-September period.
Option two: arrive by boat from Alghero
For visitors who would rather skip the 654-step climb, the sea route is the obvious alternative. Boats operate from the tourist port of Alghero and from Cala Dragunara in Porto Conte during the operating season. The official cave information describes the journey from Alghero as approximately 40 minutes, passing the coastline of the Riviera del Corallo, Capo Galera and Punta Giglio before reaching Capo Caccia.
The boat docks close to the cave entrance, making this the less physically demanding approach and adding a coastal sightseeing trip to the visit. However, it is more dependent on sea conditions. Boat services and cave entry can be affected when conditions are unsuitable, so checking the service before departure is important.
There is also a detail that catches some visitors by surprise: the boat fare and the entrance ticket to Neptune’s Grotto are separate. Paying for the boat does not include admission to the cave, and buying a cave ticket does not include the boat.
How tickets and booking work
The official Grotta di Nettuno website currently displays admission tariffs labelled 2025: €18 for a full-price ticket and €10 for several reduced categories, including visitors aged 6 to 17 and eligible university students. Children under six and specified categories of visitors receive free admission. Because the official tariff page has not been relabelled with 2026 prices at the time of writing, visitors should verify the amount shown during online booking rather than relying on an older price quoted elsewhere.
The cave recommends purchasing tickets online through Alghero Experience. From June to October, the Capo Caccia ticket office is not active, so tickets cannot simply be bought at the forecourt by the entrance to the staircase. During those months, tickets are available online, at Casa Gioiosa for visitors using the overland route, and at the Port of Alghero for those arriving by sea.
For the land route, reserving a specific visit slot is always mandatory, even if the admission ticket is purchased at a physical ticket office. Guided visits begin every hour and last approximately 30 minutes. The official schedule currently lists visits every day, subject to favourable conditions, with the last entry at 7 p.m.; seasonal or operational changes should always be checked before travelling.
Boat or stairs: which should you choose?
Choose the stairs if the cliffside approach is part of the adventure for you, you are comfortable with a substantial descent and climb, and you want to combine Neptune’s Grotto with the landscapes of Capo Caccia and Porto Conte. It is the more physically demanding option, but the Escala del Cabirol is an attraction in its own right.
Choose the boat if you prefer to avoid hundreds of steps or want to see Alghero’s coastline from the water. For many visitors, the boat journey turns the cave into a half-day coastal excursion rather than simply a sightseeing stop. The trade-off is greater sensitivity to sea conditions and the additional boat fare.
Whichever route you choose, do not build an extremely tight schedule around the visit. Weather can change access, summer transport arrangements add time to the land route, and boats are subject to maritime conditions. The official cave management recommends checking whether the site and services are operating before setting out.
Neptune’s Grotto deserves its popularity not just because of the underground chambers but because of its extraordinary position at sea level beneath the cliffs of Capo Caccia. The real decision is therefore not whether to visit, but how you want the approach to feel: a boat ride along the Riviera del Corallo, or 654 unforgettable steps above the Mediterranean.
