El Sótano is a reef and artificial reef site located within the Las Grutas Reefs. This location is defined by its rocky shelf, known as the restinga, which features deep pools that remain as the tide recedes. Snorkellers can explore these areas at depths ranging from 1 to 3 metres, with an average depth of 2 metres. Access is via the shore. Conditions at the site vary, with visibility typically between 5 and 15 metres and moderate currents. Due to the potential for strong currents, visitors should exercise caution. The site is suitable for beginners and offers a typical snorkelling duration of 60 minutes.

El Buque is a distinctive rock formation within the Las Grutas Reefs that resembles the hull of a ship. During high tide, the structure functions as a reef, while low tide exposes deep pools known as pozones. These pools allow for observation of the local environment in a concentrated area. Access to the site is via the shore, and it is suited for intermediate snorkelers. Water temperatures in the area vary throughout the year, ranging from 11C in August to 20C in February, though summer temperatures can reach 22-25C due to local tidal regimes and sun-warmed seabeds.

Don Felix is a wreck dive located within the Las Grutas Reefs, resting at depths between 18 and 20 metres. Over time, the vessel has developed into an artificial reef structure. Divers can expect mild currents and visibility ranging from 5 to 10 metres. Due to the presence of entanglement hazards and overhead environments, strict buoyancy control is required. Access to the site is by boat only, and guided tours are available through local operators in Las Grutas and San Antonio. Water temperatures fluctuate between 11 and 20 degrees Celsius, necessitating the use of a thick wetsuit or drysuit throughout the year.

Piedras Coloradas is defined by 500-million-year-old reddish rock formations that create natural pools and shelters along the Patagonia Coast. Located 5km south of Las Grutas, this reef site is accessible from the shore. Divers and snorkellers can explore depths ranging from 2m to 10m, with an average depth of 6m. The site is suitable for beginners, though visitors should be aware of surf and sharp rock formations. Water temperatures fluctuate throughout the year, ranging from 11C in August to 20C in February. Facilities at the site include parking, a cafe, and guided tours.

La Plataforma is a multi-faceted site off the Patagonia Coast near Las Grutas, featuring a combination of natural reef, artificial structures, and a wreck. Divers can explore depths ranging from 6 to 25 metres, with shallower areas suitable for beginners and deeper sections for more experienced divers. Visibility typically spans 10 to 20 metres. While currents are generally mild, they can strengthen, and night diving is available. The site supports a variety of temperate marine life, including various sharks, rays, sea lions, and invertebrates. Hazards include sea urchins, jellyfish, entanglement risks, and deep sections. A thick wetsuit or drysuit is recommended due to water temperatures ranging from 11 to 20 degrees Celsius.

Cota Cero is a shallow reef environment located on the Patagonian coast. This site is accessible via a direct shore entry, making it a straightforward option for divers. Water temperatures fluctuate between 11C and 20C throughout the year, necessitating the use of a suitable wetsuit. Visibility and currents at this location are variable and shift according to local weather and tidal movements. Divers should arrive self-sufficient, as there are no confirmed facilities at the site. It is recommended to verify current conditions locally before entering the water.

La Rinconada is a reef and artificial reef site located at the northern end of Las Grutas. The topography consists of high cliffs and a rocky seafloor. Divers can expect depths ranging from 3 to 25 metres, with an average depth of 12 metres. Access is via a shore entry. Conditions are generally mild, with visibility typically between 10 and 20 metres. Water temperatures fluctuate throughout the year, ranging from 11 to 20 degrees Celsius. The site is suitable for beginners and offers a quieter alternative to the central beach areas. Potential hazards at this location include the presence of jellyfish.

Punta Villarino is a reef site located near the southern tip of the San Antonio Este peninsula. Divers and snorkellers can access the site from the shore or by boat. Conditions are generally mild, with visibility reaching up to 20 metres and water temperatures ranging from 11C to 20C. The site is suitable for intermediate divers, with typical dives lasting around 45 minutes. Facilities available at the location include parking, toilets, and showers. Hazards to be aware of include jellyfish and sharks. The area is noted for its proximity to a permanent colony of South American sea lions, providing opportunities for wildlife interactions in a natural setting.