Grotte di Pilato is a complex of five Roman-era fish-breeding pools carved directly into volcanic tuff. Snorkellers can explore these ancient submerged tunnels and basins, which were historically used for farming. The site is accessible by boat and is suitable for beginners, offering a unique opportunity to swim through archaeological structures. Water temperatures at this marine site vary throughout the year, ranging from 15C in the winter months to 27C in August. The site is highly rated for snorkelling due to its historical significance and accessible layout.

Scoglio Rosso is a wall and reef dive site situated 50 metres from the shore near the Grotte di Pilato in Ponza. Accessible only by boat, this site features a wall topography that descends to depths between 18 and 27 metres, with an average depth of 20 metres. Divers should be prepared for moderate currents and deep water conditions. Visibility at the site ranges from 10 to 40 metres. Due to the depth and current, this location is best suited for intermediate divers. Water temperatures fluctuate throughout the year, ranging from 14C in April to 24C in September.

Punta della Madonna in Campania, Italy, offers a combination of wall and cave diving suitable for beginners. The site features depths ranging from 6 to 20 metres, allowing divers to manage their profile as they gain confidence. Access is exclusively by boat, and the site experiences mild currents. Visibility varies between 5 and 25 metres. Divers should exercise caution when navigating the cave structures, maintaining proper buoyancy to avoid contact with the rock walls. The site is available for night diving, and guided tours and boat charters are available to facilitate exploration of these distinct underwater environments.

Le Formiche is a series of outcropping rocks located southeast of the harbour at Isole Ponziane. The site features a complex topography of underwater gullies, walls, and caves that descend from 14 metres to a maximum depth of 54 metres. Access to this site is by boat only. Divers should be prepared for moderate currents, which can occasionally become strong. Visibility at the site ranges between 10 and 30 metres. Due to the depth and current conditions, this site is best suited for intermediate divers. The area is also rated for snorkelling.

Arco Naturale is a distinctive natural rock arch formation located in Campania, Italy. The site features a seabed composed of a mix of white sand and rocky reefs, which provides high contrast for observers. Snorkellers can swim directly through the archway. Access to this site is by boat only, and it is suitable for beginners. Water temperatures at the site vary throughout the year, ranging from 15C in the winter months to 27C in August. Due to the nature of the location, visitors should remain aware of boat traffic in the area.

Piscine Naturali in Campania, Italy, consists of volcanic rock pools that form sheltered natural basins. This site is suitable for beginners and offers a shallow environment with depths ranging from 1 to 5 metres, averaging 3 metres. Snorkellers can access the water via shore or boat. Conditions are generally calm with mild currents and visibility typically between 15 and 30 metres. Water temperatures fluctuate throughout the year, ranging from 15C in the winter months to 27C in August. Facilities available at the location include a boat charter, cafe, parking, and toilets. Be aware of sharp coral present in the area.

Secca dei Mattoni is a significant archaeological dive site located between Ponza and Palmarola. The site features the remains of an ancient Roman shipwreck, where divers can observe historical amphorae and a Bourbon anchor scattered across the seabed. The topography consists of a wreck and artificial reef structure reaching depths between 3 and 30 metres, with an average depth of 25 metres. Access to the site is by boat only. Conditions include moderate currents and visibility ranging up to 30 metres. Due to the depth and potential for strong currents, this site is best suited for experienced divers, though it is rated for beginners.

Cala dell'Acqua is a rocky cove in the Isole Ponziane featuring a combination of reef, artificial reef, and the shallow wreck of the Kastell Luanda. The site is suitable for beginners, with depths ranging from 2 to 24 metres and an average depth of 10 metres. Divers and snorkellers can access the site from both shore and boat. Conditions are generally mild, though visibility varies between 5 and 15 metres. The area supports a variety of Mediterranean reef fish and invertebrates typical of the region. Hazards include potential entanglement and sharp coral. A cafe is available nearby for post-dive refreshments.