Punta Morena is a boat-access reef site located off Isabela Island. The topography spans a depth range of 10 to 80 metres, making it suitable for intermediate divers. Conditions are variable, with visibility ranging from 10 to 30 metres and moderate currents that can strengthen. Divers should be prepared for thermoclines, which are prevalent at approximately 14 metres and cause sharp temperature drops. Water temperatures fluctuate between 17C and 23C depending on the season. Due to the depth and potential for strong currents, this site is intended for diving rather than snorkelling. Hazards include cold water, low visibility, sharks, and strong currents.

Elizabeth Bay, located on the western coast of Isabela Island, features a combination of reef structures and pinnacles. Divers and snorkellers can explore depths between 12 and 20 metres, though the bottom profile descends to 25 metres. The site is subject to moderate currents and surge, requiring solid buoyancy control. Visibility typically ranges from 15 to 30 metres, though it can drop significantly to between 1 and 8 metres. Cold water upwelling from the Cromwell Current often creates thermoclines. Access is by boat only, and the site is suited for intermediate skill levels. The habitat supports a variety of reef fish and invertebrates typical of the Galapagos region.

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.

Los Túneles is a distinctive site defined by a labyrinth of lava bridges and underwater tunnels. Located off Isabela Island, this marine location offers calm water conditions suitable for beginners. Access to the site is by boat. The water temperature varies throughout the year, ranging from 21C to 26C. Snorkellers can explore the unique geological formations created by the lava structures. The site is rated highly for its calm environment and accessibility, providing a stable setting for those looking to observe the underwater topography of the Galapagos.

Los Túneles is a marine site defined by a series of lava tunnels and volcanic arches. Located 15 kilometres from the shore, this site requires boat access and offers depths ranging from 1 to 10 metres, with an average depth of 5 metres. Conditions include mild currents and visibility between 5 and 25 metres. Water temperatures fluctuate between 20 and 25 degrees Celsius, with cooler conditions occurring from June to November. Due to the presence of overhead environments, sea urchins, and potential surf, guided tours are recommended. The site is suitable for beginners and provides opportunities for both diving and snorkelling.

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.

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.

El Estero is a shallow mangrove environment located at the end of the Wetlands trail on Isabela Island. This site features a unique interface where a freshwater spring meets the sea. It is best accessed from the shore during low tide, when the water forms shallow pools. The site is suitable for beginners and is primarily a snorkelling location. Water temperatures at this site vary throughout the year, ranging from 21C to 27C depending on the month. Due to the shallow nature of the mangroves, it provides an opportunity to observe the local environment in a calm, protected setting.