Playa Larga is a shore-entry snorkel site located in the Beagle Channel near Ushuaia. The site features a rocky beach and offshore kelp forests. Snorkelling here is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Conditions are variable, with visibility typically between 7 and 20 metres and mild currents. Due to water temperatures ranging from 2 to 10 degrees Celsius, drysuits are essential for all water activities. Hazards include cold water and surf. Typical snorkel sessions last approximately 40 minutes. Facilities at the site include parking and toilets.

Isla Alicia is a kelp forest and reef site located within the Bridges Archipelago in the Beagle Channel. Divers typically explore the site at depths between 5 and 15 metres, with an average depth of 10 metres. Access is by boat, as the site is situated 1500 metres from the shore. Conditions are characterised by moderate currents and visibility ranging from 7 to 10 metres. Due to water temperatures fluctuating between 2 and 10 degrees Celsius, dry suits are required for all activities. The site is suited for intermediate divers, with typical dives lasting 30 minutes. Snorkelling is possible at this location.

Isla Mary Ann is a reef and kelp forest site located within the Bridges Archipelago in the Beagle Channel. This site is accessible only by boat and is suitable for beginners, with depths ranging from 5 to 18 metres. Divers and snorkellers experience cold sub-Antarctic water conditions with visibility typically between 7 and 20 metres and mild currents. The site is known for its extensive kelp forests. Species recorded around this area include South American Sea Lions, Northern Elephant Seals, Long-nosed Fur Seals, King Crabs, sea stars, snails, and sea squirts. Night diving is permitted at this location, and the site is well-regarded for snorkelling.

Isla de los Pájaros, situated in the Beagle Channel near the Les Eclaireurs Lighthouse, offers a unique snorkeling experience focused on the island's base. The seabed is characterised by a dense covering of mussels and sea urchins. Access to this site is exclusively by boat. Due to the nature of the environment and the local conditions, this site is considered suitable for intermediate snorkelers. While the island is known for its significant avian population, the underwater environment is defined by its specific benthic composition rather than diverse marine fauna.

Isla Mary Ann in the Beagle Channel offers a sub-Antarctic diving experience featuring a combination of reef structures and dense kelp forests. The site is suitable for beginners, with depths ranging from 5 to 10 metres and mild currents. Visibility typically spans 5 to 10 metres. Divers must use a boat to access the site and are advised to deploy a surface marker buoy due to heavy boat traffic. Water temperatures are consistently cold, ranging from 2 to 12 degrees Celsius, necessitating the use of drysuits. Night diving is available at this location, with typical dives lasting around 40 minutes.

Isla de los Lobos is a rocky outcrop situated in the Beagle Channel, serving as a significant colony for South American sea lions. This site features a mix of reef and artificial reef structures, with depths ranging up to 23 metres and an average depth of 16 metres. Access is strictly by boat, as the site is located 60 kilometres from shore. Divers should expect strong currents and visibility between 7 and 20 metres. Due to water temperatures ranging from 2 to 10 degrees Celsius, drysuits are necessary year-round. The site is suited for intermediate divers, with typical dives lasting 40 minutes.

Sea Lions Island in the Beagle Channel offers a unique sub-Antarctic diving experience featuring a combination of reef and kelp forest topography. Divers can explore depths ranging from 16 to 23 metres, though the site reaches 32 metres in some areas. Conditions include mild currents and visibility between 7 and 20 metres. Water temperatures are consistently cold, typically between 7 and 9°C, making drysuits essential for all dives. The site is accessible by boat and is suitable for night diving. Divers should remain vigilant regarding potential entanglement in kelp structures and monitor depth closely throughout the dive.

Isla Redonda in the Bridges Islands offers a varied underwater environment featuring a reef, a kelp forest, and a wall. Divers can explore depths between 25 and 27 metres, with an average depth of 25 metres. Access is exclusively by boat, and the site is suited for intermediate divers due to moderate currents and the navigation requirements of the kelp forest. Visibility is variable, ranging from 7 to 30 metres. Water temperatures are cold, fluctuating between 2 and 4°C in winter and 8 and 10°C in summer. Drysuits are essential for all dives at this location.