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.

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.

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.

Tortuga Island in Ecuador is a reef dive site suited for intermediate divers. Access is by boat, with dives typically lasting 45 minutes. The site features depths ranging from 12 to 18 metres, with an average depth of 15 metres. Conditions are variable, with visibility between 5 and 15 metres and moderate currents. Divers should be prepared for surge and cold water, as thermoclines are common and temperatures can fluctuate between 13 and 26 degrees Celsius. Hazards at this location include strong currents, surge, and the presence of sharks.

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.

Punta Vicente Roca is situated on the northwestern nose of Isabela Island, Ecuador. This site features steep volcanic walls and sea caves that provide a complex topography for snorkellers. Access is exclusively by boat due to the distance from shore. The site is subject to strong currents and variable visibility ranging from 8 to 33 metres. Water temperatures fluctuate between 21C and 26C throughout the year. Given the challenging current conditions, this site is best suited for intermediate-level snorkellers. The nutrient-rich waters are influenced by cold-water upwellings, creating a dynamic marine environment.

Urbina Bay is a unique site defined by a significant 1954 geological uplift that left coral reefs stranded on land. Located at Isabela and Fernandina Islands, this reef and drift site offers shallow diving with an average depth of 3 metres, ranging between 1 and 5 metres. Divers and snorkellers should be prepared for strong currents and surf conditions, with visibility typically between 3 and 10 metres. Water temperatures fluctuate between 21C and 27C due to the influence of the Cromwell Current upwelling. Access is available via both shore and boat entries, making it suitable for beginners looking to explore this geologically significant area.