Tagus Cove is a historic deep-water bay located on the west coast of Isabela and Fernandina Islands. This site features a combination of reef and wall topography, with steep cliffs dropping into the water. Snorkellers can explore depths ranging from 8 to 30 metres, with an average depth of 24 metres. Access is strictly by boat due to the distance from shore. Conditions at this site vary, with visibility ranging from 6 to 30 metres and currents that can be strong. Given these environmental factors, the site is best suited for intermediate snorkellers.

Punta Espinoza, located on Fernandina Island, is a reef site accessible only by boat. The topography supports a variety of marine life, including very common wrasses and sea stars, alongside common cardinalfish and grunts. Divers and snorkellers may also encounter uncommon species such as California sea lions, horn sharks, king angelfish, groupers, blue-barred parrotfish, scorpionfish, pufferfish, Sally Lightfoot crabs, Panamic cushion stars, and sea hares. The site is known for its marine iguana colony, with individuals occasionally observed feeding underwater. Depths range from 6 to 24 metres, averaging 18 metres. Conditions include moderate currents, surge, and visibility between 8 and 30 metres. Cold upwelling from the Cromwell Current can cause significant temperature drops.

Cape Douglas, located off the northwest coast of Fernandina Island, offers a challenging drift diving experience characterised by a wall that descends from 12 metres to depths of 100 metres. The site is accessible only by boat and is suited for advanced divers due to strong, shifting currents and potential surge. Visibility typically ranges between 10 and 30 metres. Water temperatures fluctuate between 17C and 23C, with thermoclines and cooler currents frequently present. Divers should be prepared for low visibility and exercise caution around sharp rocks and coral. A surface marker buoy and dive knife are recommended for all entries.

Tagus Cove is a sheltered bay located on the western coast of Isabela Island, situated below Darwin Lake. This site offers a varied underwater topography featuring reefs and walls suitable for intermediate divers. Access is exclusively by boat. Divers should be prepared for moderate currents and surge, with depths typically ranging between 20 and 40 metres. Visibility fluctuates between 10 and 25 metres. Water temperatures generally range from 18 to 23C, though significant drops are common due to upwelling from the Cromwell Current and frequent thermoclines. Hazards include cold water, strong currents, and surge. The site is also suitable for snorkelling.

Cape Marshall is a wall and drift site located on the outer edge of Isabela Island. The topography ranges from 10 to 40 metres, with an average depth of 18 metres. Divers must be prepared for strong, shifting currents and variable visibility ranging from 3 to 21 metres. Thermoclines are prevalent around 14 metres, influenced by the cold Cromwell current. Due to the drift nature of the site and the presence of sharks, this location is strictly for advanced divers. Boat access is required, and the use of an SMB is essential. Water temperatures fluctuate between 19 and 24 degrees Celsius throughout the year.

Punta Albemarle, located at the northern tip of Isabela Island, offers a challenging combination of reef, wall, and drift diving. The topography features a wall that descends from 25 to 100 metres, requiring careful depth management and advanced certification. Divers encounter moderate currents that can shift quickly, often accompanied by cold upwellings from the Cromwell current. Visibility typically ranges between 10 and 30 metres. Due to the deep nature of the site, strong currents, and the presence of sharks, this location is suited for intermediate to advanced divers. A surface marker buoy is essential for all entries, which are conducted by boat.

Cabo Douglas is a drift dive site located off the coast of Fernandina Island. The topography features a sea floor covered in corals, sponges, and gorgonians. Divers can expect a maximum depth of 22 metres. While the site is accessible to those with experience, conditions are characterised by strong currents, which can make the dive challenging. Visibility at this location can reach up to 30 metres. Water temperatures fluctuate between 20C and 26C throughout the year, depending on the month. Due to the current, this site is primarily suited for divers comfortable with drift diving techniques.

Roca Redonda is an isolated volcanic pinnacle located in the northern Galapagos. This site features wall diving that extends from the surface to a depth of 35 metres, with an average depth of 18 metres. Divers must be prepared for strong currents and surge, which are common due to upwellings from the Humboldt Current. Visibility is highly variable, ranging from 5 to 30 metres. Given the challenging conditions, including cold water and boat traffic, this site is strictly for advanced divers. Boat access is required, and the use of a surface marker buoy is essential for safety. Proper buoyancy control and careful monitoring of dive profiles are necessary at all times.