La Mattonara in the Tuscan Archipelago features ancient Roman fish ponds that serve as an artificial reef. This site offers a shallow snorkeling experience with depths ranging from 1 to 5 metres, averaging 3 metres. The submerged walls of the ruins create a sheltered environment suitable for beginners. Access is via the shore, and water conditions typically feature mild currents. Water temperatures fluctuate throughout the year, ranging from 14C in March to 26C during the summer months of July and August. Snorkellers should be aware of sharp coral present at the site.

Murata di Sant'Agostino is a reef located 2414 metres off the coast of the Tuscan Archipelago. This site features a shoal rising from a maximum depth of 38 metres to a shallowest point of 24 metres. Divers typically spend 50 minutes exploring the topography, which is subject to moderate currents. Visibility at the site ranges between 10 and 20 metres. Due to the depth and potential for nitrogen narcosis, this site is suitable for advanced divers only. Boat access is required to reach the location. Water temperatures fluctuate between 14C and 18C throughout the year.

Spiaggia di Sant'Agostino in the Tuscan Archipelago features a long beach with a predominantly rocky seabed at its northern end. Divers can explore interesting rock formations located just a few metres from the shore. The site is suitable for intermediate divers, offering depths ranging from 2 to 36 metres with an average depth of 7 metres. Access is via a shore entry. Conditions vary, with visibility typically between 3 and 10 metres and mild currents. Water temperatures fluctuate between 14C and 19C throughout the year. The site is also accessible for snorkelling, holding a rating of 3 out of 5.

Il Pirgo is a popular shore-entry site located near the city centre of Civitavecchia. The topography consists of a natural reef complemented by an artificial reef formed by a semi-outcropping breakwater cliff. This structure protects the swimming area, resulting in mild currents suitable for beginners. Water temperatures fluctuate between 14C and 26C throughout the year. Species recorded around this area include Mediterranean moray, wrasses, scorpionfish, and various invertebrates such as sea stars and flat crabs. Facilities at the site include parking, toilets, showers, a cafe, equipment rental, and first aid. Divers and snorkellers should be aware of sharp coral present in the area.

Grotta Aurelia is a shallow coastal site near Civitavecchia, Italy, characterised by a mix of reef, cave, and artificial reef structures. The topography consists of rocky crevices and small grotto-like overhangs. With an average depth of 4 metres, this site is accessible from the shore and is suitable for beginners. Conditions are generally mild, though divers and snorkellers should be aware of sea urchins and sharp coral in the area. Facilities available at the site include showers, toilets, boat charter services, and guided tours. Typical dives last approximately 30 minutes, and the site is rated 3 out of 5 for snorkelling.

Punta del Pecoraro features a diverse underwater topography consisting of a reef, wall, and canyon system. The site also includes small caves and crevices within the rocky promontory. Divers can expect depths ranging from 8 to 17 metres, with an average depth of 12 metres. This shore-entry site is suited for intermediate divers and typically involves a 40-minute dive. Conditions include moderate currents and water temperatures fluctuating between 14C and 24C throughout the year. Snorkellers may also explore the area, which holds a rating of 3 out of 5. Hazards at this location include sea urchins and sharp coral.

Marangone Beach is a pebble beach featuring a boulder-strewn bottom that offers varied topography for divers and snorkellers. Located near Civitavecchia, this site is suitable for beginners, with depths ranging from 2 to 9 metres and an average depth of 5 metres. Shore entry is standard, though visitors should be aware of potential surf and the presence of sea urchins. Visibility typically fluctuates between 5 and 15 metres. The site provides convenient facilities including parking, changing rooms, toilets, showers, and a cafe. Dives here typically last around 30 minutes, and the location is well-suited for casual snorkelling.

Canaloni is a reef and canyon site located near the tourist port of Riva di Traiano. The topography features a mix of flat sand, rock formations, and distinct rock tongues that give the site its name. Divers typically explore depths ranging from 18 to 28 metres, with an average depth of 23 metres. Conditions include mild currents and visibility between 2 and 10 metres. Due to the depth, this site is suited for intermediate divers. Access is by boat only, and the site offers a typical dive duration of 45 minutes. Facilities available nearby include parking, showers, changing rooms, a rinse station, and air fills.