Bahia Lapataia, located within Tierra del Fuego National Park, features a combination of reef and dense kelp forest. Divers can explore depths ranging from 3 to 25 metres, with an average depth of 3 metres. The site is accessed directly from the shore, where parking and guided tours are available. Visibility typically fluctuates between 5 and 15 metres. While currents are generally mild, divers must account for surge and swell conditions. Due to the very cold water temperatures, which range from 2.0 to 12.0 °C depending on the season, drysuits are required. Night diving is also permitted 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 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.

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.

Estancia Túnel is a shore and boat-accessible site located in the Beagle Channel, situated in front of an abandoned historic farm. The topography features rocky reefs and kelp forests ranging from 2 to 23 metres in depth, with an average depth of 5 metres. Conditions are variable, with visibility between 7 and 20 metres and moderate currents. Due to water temperatures ranging from 2°C to 10°C, dry suits are mandatory for all divers. The site is suited for intermediate skill levels. 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.

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 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.