Scoglio d'inferno is a boat-access pinnacle dive off Capo Caccia in Alghero, with life-rich walls, arches and a dramatic rock cone that attracts schools of barracuda. The site is interesting for both beginner and experienced scuba divers because the structure is easy to read, the marine life is busy and the route stays close to the rock. It is a classic Sardinian boat dive: simple to follow, scenic, and strong on fish life rather than technical challenge.