Hotels near Neptune's Grotto (Grotta di Nettuno)

Carved into the towering cliffs of Capo Caccia, 24 km west of Alghero, Neptune's Grotto is one of the Mediterranean's most impressive sea caves. The cavern extends roughly 4 km into the rock (about 200 metres is open to visitors), filled with stalactites, stalagmites, columns, and an underground saltwater lake called La Marmora. The formations are dramatically lit and reflected in the still water, creating an otherworldly atmosphere.

There are two ways to reach the grotto. The more dramatic approach is the Escala del Cabirol - a staircase of 656 steps carved into the cliff face, descending 110 metres to the cave entrance. The views during the descent are extraordinary. Alternatively, boat services run from Alghero's port (roughly 30 minutes each way, EUR 15-17 return). The cave is open from April to October, weather permitting, with guided tours every hour. Entry costs around EUR 14 for adults.

Pro Tip: Take the boat from Alghero if seas are calm - the coastal views of Capo Caccia's cliffs are spectacular. If you drive, arrive early to combine the staircase descent with a visit to the Capo Caccia viewpoint. The cave closes in rough weather, so check conditions before making the trip.