Neptune's Grotto
Grotta di Nettuno
A huge stalactite sea cave beneath the cliffs of Capo Caccia, with an underground saltwater lake inside. You can enter by boat or descend about 654 cliffside steps.
Neptune’s Grotto is Sardinia’s most famous sea cave. Its entrance sits right at sea level, and the interior has a stalactite hall and an underground lake about 100 meters long. There are two ways to get there: take a boat from Alghero harbor, a trip of about 45 minutes (more frequent in summer), or drive to Capo Caccia and descend the roughly 654 steps of the “Escala del Cabirol” to the cave entrance. The climb back up is tiring. The cave tour is guided and lasts about 45 minutes. The cave closes in rough seas, so check conditions before you set out.
Opening hours
About April–October 09:00–19:00; shorter in winter (check the official website)
Nearby sights
- Capo Caccia
- Punta Giglio
- Porto Conte Regional Natural Park
- Mugoni Beach
- Nuraghe di Palmavera
- Lazzaretto Beach
- Le Bombarde Beach
- Lake Baratz