Neptune's Grotto from Alghero: By Boat or Down 654 Steps?
Updated October 19, 2026 · 6 min read
You can reach Neptune’s Grotto two ways: by boat from Alghero harbour, or by car to Capo Caccia and then down the 654 steps of the Escala del Cabirol. The stairs are cheaper and give you the cliff from above; the boat spares your knees and shows you the cliff from the sea. Either way you pay for the cave visit itself separately.
Neptune’s Grotto (Grotta di Nettuno) is a sea cave at the foot of the Capo Caccia headland, about 25 km from Alghero. A guided walk leads through chambers with stalactites and columns to a salt-water lake. The grotto is open only when weather and sea conditions allow, and it stays shut on 24 and 25 December, according to the official site.
The two routes side by side
| Boat from Alghero | Escala del Cabirol | |
|---|---|---|
| Start | Alghero harbour | Capo Caccia car park |
| Getting there | about 40 minutes each way by boat | about a 35-minute drive of roughly 25 km |
| Effort | none to speak of | 654 steps down and the same number back up |
| Cost | boat fare of around €18 per adult, plus cave ticket | cave ticket only; the car park at Capo Caccia is free |
| Weather | sea state decides whether boats run | the cave can still close when the sea is rough |
| Season | published sources give April to October | check the official site for access outside the boat season |
The figures come from the operators’ published information and travel guides, and they differ slightly between sources. Check the official grotto website and the boat operators for current prices and times before you set out.
The boat: easy on the legs, hostage to the sea
Boats leave from the harbour in Alghero, and a second departure point exists at the Cala Dragunara pier inside Porto Conte. Allow about 40 minutes each way from Alghero. The boat ticket does not include entry to the grotto, so you buy two tickets, and in summer slots fill up. Booking ahead is sensible from June to September.
The weakness is the sea. When the swell is up, boats do not run and the cave entrance can be closed. A calm morning forecast is not a guarantee for the afternoon, so keep a day free in your schedule if the grotto is the main reason for your trip.
The stairs: 654 steps and no shade
The Escala del Cabirol (the name is Catalan for “the roe deer’s staircase”) cuts down the western face of the headland to the cave mouth. Reports put the walk at about 15 minutes down and about as long back up. There is almost no shade, and in midsummer the climb back is the hard part, not the descent.
Take the stairs if you are comfortable with several hundred steps in heat and you want to arrive by car. Skip them with young children, bad knees, heart or breathing problems, or in the afternoon sun. Nothing on the route is described as step-free, so anyone with limited mobility should ask the operators first and not rely on this guide. Free admission is available for very young children and for people with disabilities and their carers; the official site lists the exact conditions.
If you drive, you can compare car hire for Alghero. Capo Caccia has no public transport worth planning around, and the car park can get tight at peak times.
What a Capo Caccia boat tour does and does not include
Several boat tours from Alghero sail past Capo Caccia, and they are easy to confuse with a grotto visit. The snorkelling boat tour in Porto Conte and Capo Caccia lasts 3 hours, costs €83.50 and has a 4.9 rating from 296 reviews. Its listing describes a guided snorkelling trip for all levels along the coast of the Porto Conte Park. It says nothing about entering Neptune’s Grotto, so read the booking page carefully before you assume it does.
The coast here is protected: the marine reserve of Capo Caccia and Isola Piana runs from the cape into Porto Conte, with stricter rules in its core zones. That is a reason to go with a licensed operator and not a hired boat if you want to swim near the cliffs.
For more boat options see boat tours in Alghero, or sailing trips from Alghero if you would rather do a longer day under sail.
Which one should you choose?
- Fit adults with a car, in spring or autumn: the stairs. They cost nothing beyond the cave ticket and you stay flexible.
- Families with small children, older travellers, anyone worried about heat: the boat, with a reservation and a spare day in case the sea says no.
- Visitors who mostly want the coast, not the cave: a snorkelling or sailing tour past the cape, and treat the grotto as a bonus only if the booking page names it.
Whatever you pick, confirm the day’s opening and the sea forecast on the morning you go. The grotto is magnificent, but it only opens when the water lets it.
