Secchitello is a prominent pinnacle and reef system located 1609 metres off the coast of Ustica, Italy. The site features large pinnacles rising from a depth of 50 metres to approximately 24 metres. Divers encounter a variety of marine life including Great Barracuda, European Parrotfish, Mediterranean Violet Aeolid, Cow Snail, and various wrasses. Other species recorded at the site include Mediterranean Cardinalfish, Bream, Painted Comber, Hermit Crab, Violescent Sea-whip, Purple Sea Star, Two-banded Seabream, Marine Goldfish, and hard coral. Due to strong currents and depths reaching 50 metres, this site is strictly for advanced divers. Boat access is required for this 30-minute dive, which offers visibility of 30 metres.

Secca d'Africa is a notable archaeological dive site located 3200 metres off the coast of Ustica, Italy. This offshore shoal features a rocky seabed characterised by natural arches and structures that serve as an underwater archaeological itinerary. Divers can explore historical remains, including Roman and Byzantine anchors scattered across the site. The topography ranges from 5 to 30 metres in depth, with an average depth of 18 metres. Access is strictly by boat due to the distance from shore. Conditions generally feature mild currents and visibility ranging between 10 and 30 metres. Divers should remain aware of boat traffic in the area.

Punta Cavazzi in Ustica is a volcanic site featuring a natural pool enclosed by cliffs, connected to the open sea by an underwater passage. The topography includes a reef and cave system suitable for beginners, with depths ranging from 1 to 24 metres and an average of 15 metres. Divers and snorkellers can expect mild currents and visibility between 10 and 25 metres. Entry is via the shore, and the site is well-suited for both diving and snorkelling. Water temperatures fluctuate between 15C and 23C throughout the year. As this site includes a cave, divers should be aware of the overhead environment hazard.

Grotta dei Gamberi is a complex marine site off the coast of Ustica, Italy, characterised by a dramatic wall and drop-off that descends from the surface to 45 metres. The topography features arches, large rocks, and a notable cave located at a depth of 40 metres. Due to the depth and the overhead environment of the cave, this site is strictly for advanced divers. Access is by boat only, with typical dives lasting 40 minutes. Divers encounter mild currents and visibility consistently reaching 30 metres. Water temperatures range from 15C to 20C throughout the year. Hazards include the significant depth, potential for nitrogen narcosis, and the overhead cave environment.

Caletta Acquario is a sheltered cove in Ustica, Italy, providing an accessible environment for snorkellers. The site features a concrete platform that facilitates easy shore entry, making it suitable for beginners and families. The reef begins just a few metres from the shore, with depths starting at two metres. Conditions are generally mild, though water temperatures fluctuate throughout the year, ranging from 15C in the winter months to 28C in August. A cafe is available nearby for visitors. This site is well-regarded for snorkelling, offering a straightforward entry point into the Mediterranean marine environment.

Grotta delle Cipree is a cave and reef site located off the coast of Ustica. Divers access this location by boat, with depths ranging between 18 and 23 metres. The site features an overhead environment that requires strict buoyancy control and adherence to cavern certification standards. Visibility is consistently high at 30 metres, and the area experiences mild currents. A halocline within the cave maintains a constant temperature, though ambient water temperatures vary from 15 to 23 degrees Celsius throughout the year. Guided tours are strongly recommended for first-time visitors to safely navigate the cave layout and swim-throughs.

Le Piramidi is a reef site located off the coast of Ustica, Italy. Accessible only by boat, this location is suited for intermediate divers capable of managing variable currents. The site features shallow depths throughout, which allows for extended bottom times to explore the reef structure. Water temperatures fluctuate significantly, ranging from 15C in the winter months to 28C during the summer. Because visibility and current strength can shift, conditions on the day of your visit will determine the character of the dive. Divers should verify boat departure times and local conditions with regional operators before planning their trip.

Cala Sidoti is a shore-access reef located within the integral reserve of Ustica. The site features a shallow volcanic pebble seabed with depths ranging from 1 to 10 metres, averaging 5 metres. It is well-suited for beginners and offers a high-quality snorkelling experience. Conditions are generally mild, though visibility varies between 5 and 20 metres. Water temperatures fluctuate significantly throughout the year, ranging from 15C in winter to 28C in August. Divers and snorkellers should be aware of sea urchins present in the area. Equipment rental is available nearby to support visitors.