Dirty Rock is a deepwater pinnacle system located at Cocos Island, Costa Rica. The site features a reef and pinnacle structure with depths ranging from 29 to 35 metres. Divers experience strong, consistent currents and surge, requiring advanced certification and experience with exposed, high-current environments. Visibility is typically 30 metres. Water temperatures range from 25 to 28C, though thermoclines are common and can cause temperatures to drop significantly at depth. Access is by boat only, and divers must monitor depth and surface boat traffic closely. Due to the depth and current conditions, this site is suitable only for advanced divers.

Big Dos Amigos is a deep pinnacle and reef site located off Cocos Island, Costa Rica. Designed for advanced divers, the site features depths between 20 and 40 metres with an average of 25 metres. Strong currents and surge are defining characteristics, requiring confident drift technique and buoyancy control. Visibility varies from 10 to 30 metres. Access is strictly by boat, and the site is not suitable for snorkelling. Divers must be prepared for deep water conditions and potential cold thermoclines. Always carry a surface marker buoy, as currents can displace divers from the boat during ascent.

Small Dos Amigos is an exposed drift dive located off Cocos Island, Costa Rica, characterised by strong currents and open ocean conditions. The site features a reef topography ranging from 23 to 50 metres, with an average depth of 25 metres. Due to the significant surge, swell, and current, this site is strictly for advanced divers who possess solid buoyancy control. Visibility fluctuates between 10 and 30 metres. Access is exclusively by boat, and divers must remain alert for heavy boat traffic in the area. A surface marker buoy is essential for all dives at this location to ensure safety in the open water.

Isla Cascara is a reef site located within the Cocos Island marine reserve, accessible only by boat. The site features a reef and cave system with an average depth of 25 metres. Water temperatures are warm, typically ranging between 27 and 30 degrees Celsius, though thermoclines can cause temporary drops. Visibility fluctuates between 10 and 30 metres, and divers should be prepared for variable conditions. While currents are generally mild, the site is subject to surge and swell. Night diving is permitted, offering an alternative perspective of the reef structure. Divers should exercise caution regarding sharp coral and rock formations while navigating the area.

Shark Fin Rock is an exposed oceanic pinnacle located off Cocos Island, Costa Rica. The site features a reef structure dropping from 15 to 40 metres, with an average depth of 25 metres. Divers encounter strong currents and occasional cold thermoclines, requiring advanced skills and solid buoyancy control. Visibility typically ranges between 10 and 30 metres. The site is accessible only by boat, and night diving is available through liveaboard operators. Species recorded around this area include whitetip reef sharks, spotted eagle rays, various moray eels, groupers, and wrasses. Due to the surge, swell, and strong currents, divers must maintain close contact with their guide throughout the 50-minute dive.

Submerged Rock is a deep offshore pinnacle located 1600 metres from the shore of Cocos Island. The site topography features a mix of open-water pinnacle diving and cave sections, with depths ranging from 20 to 42 metres. Divers must be prepared for moderate currents, surge, and overhead environments. Visibility typically fluctuates between 10 and 30 metres. Due to the depth and conditions, this site is strictly for advanced divers with deep certification. Boat entry is required, and divers should remain aware of potential entanglement risks within the structure. Water temperatures generally range from 24 to 27C, though occasional thermoclines can cause temperatures to drop into the low 20s.

Isla Pajara is a reef, wall, and pinnacle system located off Cocos Island. This site is suited for advanced divers due to strong, unpredictable currents and surge. Divers typically explore between 15 and 30 metres, with visibility ranging from 10 to 30 metres. Thermoclines are common below 20 metres, often requiring a full wetsuit. Marine life includes whitetip reef sharks, spotted eagle rays, yellow-edged and Panamic green morays, king angelfish, wrasses, groupers, redlip parrotfish, triggerfish, bluefin trevally, moorish idols, rock cod, and various pufferfish. Boat access is required for this site, which also supports night diving. Divers should maintain close proximity to their guide and establish clear drift abort signals.

Chatan Bay is a pinnacle and reef site located off Cocos Island, Costa Rica. The site features a consistent depth of 13 metres and is accessible only by boat. Divers should be prepared for moderate currents and surge, which can influence the experience. Visibility at the site typically ranges between 15 and 30 metres. Given the environmental conditions and the nature of the location, this site is suited for intermediate divers. Typical dive times are approximately 40 minutes. Hazards to be aware of include sharks, strong currents, and surge.