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.

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.

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.