Cannelle is a reef site located near Porto Ercole, Italy, featuring a sandy centre flanked by granite boulders at the north and south ends. This accessible shore entry site is suitable for beginners, with an average depth of 3 metres and a maximum depth of 5 metres. Divers and snorkellers can expect mild currents and visibility ranging from 10 to 25 metres. The site offers various facilities including parking, toilets, showers, equipment rental, and air fills. Water temperatures fluctuate throughout the year, ranging from 14C in March to 26C in July and August. Please be aware of sharp coral hazards when navigating the rocky areas.

Cala dello Smeraldo is a rocky cove located near Porto Ercole, accessible via a steep staircase of 120 steps. The site features deep water and is suitable for intermediate snorkellers. Entry can be made from the shore or by boat. Water temperatures fluctuate throughout the year, ranging from 14C in March to 26C in July and August. Species recorded around this area include wrasses, Mediterranean moray, European common cuttlefish, and common octopus. Divers and snorkellers should be aware of sharp coral present at the site. Typical snorkelling sessions last approximately 15 minutes.

Allume is a marine site located 500 metres off the coast of Isola del Giglio, featuring a combination of reef and cave topography. The site ranges in depth from 10 to 30 metres, with an average depth of 15 metres. Access is strictly by boat, and divers should be prepared for moderate currents that can strengthen without warning. The presence of an overhead environment within the cave system requires careful buoyancy control and air management. Visibility typically spans 10 to 30 metres. Water temperatures fluctuate between 14 and 20 degrees Celsius, necessitating a 5mm wetsuit in warmer months and a 7mm suit during the cooler periods from autumn through spring.

Caletta del Saraceno is a small cove located in Porto Ercole, Italy, notable for the submerged remains of an ancient Roman muraeum, or fish pond. This site is suitable for beginners, offering shallow depths ranging from 2 to 5 metres with an average of 3 metres. Access is via the shore, and the site features facilities including parking, showers, and changing rooms. Visibility typically fluctuates between 5 and 15 metres. The site is suitable for both diving and snorkelling, with night diving also available. Typical dives last approximately 30 minutes, and water temperatures vary throughout the year from 14C to 26C.

Scoglio del Corvo is a reef and wall site located 500 metres off the coast of Porto Ercole. The site features a significant wall structure that drops to depths between 35 and 50 metres. Due to the depth and moderate currents, this site is suited for intermediate divers. Water temperatures range from 14 to 17 degrees Celsius, necessitating appropriate thermal protection. Access is exclusively by boat, and the site supports night diving. Divers should monitor bottom time closely and plan descents carefully to manage current conditions along the wall. Guided tours are available through local facilities to assist with navigation and safety.

Spiaggia delle Caldane is a reef site located near Porto Ercole, Italy, featuring golden granitic sand and surrounding cliffs. The site is suitable for beginners, with depths ranging from 1 to 8 metres and an average depth of 4 metres. Access is available by both boat and foot. Conditions are generally mild, though current can vary. Species recorded around this area include wrasses, Mediterranean moray, common octopus, European common cuttlefish, and scorpionfish. Facilities at the site include equipment rental and a cafe. It is a highly rated location for snorkelling.

Cala Cupa is a wall and reef dive site located 500 metres off the coast of Porto Ercole, Italy. The site features a depth range of 12 to 35 metres, with an average depth of 25 metres. Access is strictly by boat. Divers can expect mild currents and visibility ranging from 10 to 30 metres. Water temperatures fluctuate between 14C and 19C throughout the year. Due to the depth and the presence of sharp coral, this site is suited for intermediate divers. A typical dive lasts approximately 45 minutes.

Le Scole is a group of granite islets located 800 metres from the shore near Porto Ercole. The site features a diverse topography including reefs, walls, and artificial structures, most notably a submerged statue of the Madonna, Stella Maris, positioned at a depth of 20 metres. Depths range from 25 to 60 metres, with an average of 25 metres. Conditions include mild currents and visibility between 10 and 30 metres. The shallower rocky areas are suitable for snorkelling, while the deeper sections are intended for intermediate divers. Boat access is required. Hazards include boat traffic, deep water, entanglement risks, and potential for strong currents.