Chankanaab is a protected marine area located on Cozumel Island, Mexico, offering a diverse underwater environment that includes reefs, artificial structures, and caves. Divers can explore underwater statues of Christ and the Virgin Mary within a controlled setting. The site is suitable for beginners, with depths ranging from 3 to 16 metres and an average of 10 metres. Conditions are generally calm with mild currents and visibility between 15 and 30 metres. Shore entry is available, and the site provides comprehensive facilities including parking, showers, equipment rental, and guided tours. Night diving is permitted, and the area is well-regarded for snorkelling.

Columbia Reef and Palancar Bricks is a drift dive site located 6000 metres offshore from Puerto Aventuras. This site features a reef and wall topography with depths ranging from 4 to 27 metres, averaging 23 metres. Divers should expect moderate currents and visibility between 12 and 60 metres. Boat access is required for this intermediate-level dive. Water temperatures remain warm throughout the year, typically between 27 and 30 degrees Celsius. Species recorded around this area include French Angelfish, Nurse Sharks, Great Barracuda, Spotted Moray, Rock Beauty, Spotted Scorpionfish, Indian Lionfish, Queen Angelfish, Green Moray, Chain Moray, Caribbean Reef Octopus, Wrasses, Whiptail Stingray, and Foureye Butterfly Fish. Night diving is available at this location.

The C-53 is a minesweeper wreck resting on a sandy bottom at depths between 10 and 24 metres. As an artificial reef, the hull supports sponges and various corals, while the surrounding sand is home to garden eels. Divers can explore the interior, where glassy sweepers inhabit darker passages and spiny lobsters occupy crevices. Visibility typically ranges from 25 to 40 metres. This site requires boat access and is suited for intermediate divers due to moderate currents and the overhead environment presented by the wreck structure. Divers should maintain buoyancy control and use a torch for internal swim-throughs.

Playa Corona in Puerto Aventuras is a shallow reef site accessible directly from the shore. The reef structure sits close to the beach, allowing for easy entry for both divers and snorkellers. Depths at this location range from 3 to 20 metres, with an average depth of 9 metres. Conditions are generally stable with mild currents and visibility reaching 30 metres. Water temperatures remain warm throughout the year, ranging between 27C and 30C. Visitors should be aware of potential hazards including boat traffic, sharp coral, and surf. On-site facilities include parking, toilets, and showers to support extended visits.

San Francisco Wall is a drift dive site located off Puerto Aventuras. The topography features a reef wall with depths ranging from 12 to 30 metres, averaging 18 metres. Divers encounter moderate currents and visibility between 15 and 30 metres. Marine life is diverse, with common sightings of French Angelfish, wrasses, Pacific Trumpetfish, Smooth Trunkfish, Blue Tang, Caribbean Spiny Lobster, Purple Sea Fan, Caribbean Ocean Surgeonfish, Oceanic Triggerfish, and Foureye Butterfly Fish. Less frequently, divers may spot Queen Angelfish, Nurse Sharks, Spotted Moray, and Great Barracuda. Due to the current and depth, this site is suited for intermediate divers. Boat access is required for all dives, which typically last 45 minutes.

Recif Palancar is a reef and wall site located 2000 metres from the shore of Puerto Aventuras. This drift dive site features an average depth of 12 metres and is accessible only by boat. Divers should be prepared for moderate currents and visibility ranging from 15 to 40 metres. The site is suitable for intermediate divers and supports night diving. Hazards include boat traffic, sharp coral, and potential for strong currents. Water temperatures remain warm throughout the year, typically between 27 and 30 degrees Celsius. Typical dives at this location last approximately 50 minutes.

Sky Reef in Puerto Aventuras is a shore-entry site featuring a combination of natural reef and artificial structures. The reef begins just metres from the shore, characterised by rocky outcroppings and large fan corals. Depths range from 2 to 20 metres, with an average of 10 metres. Conditions are generally mild, though snorkelers and divers should be aware of potential surf, jellyfish, and sharp coral. The site is well-equipped with facilities including a dive shop, equipment rental, and rinse stations. Marine life recorded here includes Queen and French Angelfish, Nurse Sharks, Great Barracuda, Caribbean Spiny Lobster, and various wrasses, groupers, and rays.

Francesa is a reef site located off Puerto Aventuras, Mexico, designed for drift diving. The site features depths ranging from 12 to 30 metres, with an average depth of 15 metres. Divers access the reef exclusively by boat. Conditions include moderate currents and visibility typically between 15 and 30 metres. Water temperatures remain consistent throughout the year, ranging from 27C to 29C. The site is suitable for beginners and supports night diving, with a typical dive duration of 50 minutes. Hazards at this location include surge, strong currents, and sharp coral. No specific marine life data is available for this site.