John Pennekamp Coral Reef State Park features a diverse underwater environment including natural reefs, wrecks, artificial reefs, and seagrass beds. Located near Key Largo, the site offers depths ranging from 1 to 15 metres, with an average depth of 8 metres. Conditions vary, with visibility between 5 and 25 metres and moderate currents. Access is available via both shore and boat, making it suitable for beginners. Divers should be aware of hazards including boat traffic, sharp coral, strong currents, and surf. Facilities at the park include parking, toilets, showers, changing rooms, equipment rental, a cafe, a dive shop, and boat charter services. Night diving is permitted at this location.

Horseshoe Reef in John Pennekamp Coral Reef State Park features a combination of natural coral formations and artificial reef structures. Located 1500 metres from shore, this site is accessible only by boat. Divers can expect depths ranging from 5 to 11 metres, with an average of 8 metres, making it suitable for beginners. Conditions include mild currents and visibility that fluctuates between 5 and 21 metres. Due to variable visibility, divers should maintain close proximity to their group. Exercise caution around the reef structure to avoid sharp coral and rocks. The site is also suitable for night diving, with typical dives lasting around 30 minutes.

North Dry Rocks is a reef site located within John Pennekamp Coral Reef State Park. Accessible only by boat, the site features depths ranging from 4 to 14 metres, with an average depth of 7 metres. Conditions are generally mild, though visibility can vary between 10 and 30 metres. The site is suitable for beginners and supports both diving and snorkelling activities, including night diving. Divers and snorkellers should remain aware of boat traffic in the area and take care to avoid sharp coral. Guided tours and boat charters are available to facilitate access to this offshore location.

Dry Rocks is a reef site located within John Pennekamp Coral Reef State Park, notable for housing the Christ of the Abyss statue. Installed in 1965, this nine-foot tall monument serves as a distinct underwater landmark. The site features depths ranging from 3 to 10 metres, with an average depth of 8 metres. Access is by boat only, as the site is situated 6400 metres from the shore. Divers and snorkellers can expect mild currents and visibility between 10 and 30 metres. The site is suitable for beginners, with typical dives lasting 40 minutes. Hazards include boat traffic, jellyfish, sea urchins, sharp coral, strong currents, and surf.

Cannon Patch in John Pennekamp Coral Reef State Park is a shallow site featuring a combination of natural and artificial reef structures. With depths ranging from 1 to 2 metres, it is suitable for beginner divers. The site experiences mild currents and visibility typically between 1 and 4 metres. Due to the shallow nature of the reef, divers should exercise caution regarding sharp coral and rocks. Boat access is required to reach this site, which lies 40 metres from shore. Water temperatures remain warm throughout the year, ranging from 24 to 31 degrees Celsius. Divers must remain vigilant for boat traffic while at the surface.

Christ of the Abyss is an iconic 8.5-foot bronze statue submerged at North Dry Rocks within John Pennekamp Coral Reef State Park. Located approximately 8 kilometres offshore, this site features a shallow reef environment with depths ranging from surface to 20 metres, averaging 8 metres. Snorkellers and divers can observe a variety of marine life, including wrasses, blue tang, stoplight parrotfish, and purple sea fans. Less frequently, visitors may encounter nurse sharks, great barracuda, and various angelfish species. Access is by boat only, and the site is suitable for beginners. Conditions generally include mild currents and visibility between 10 and 30 metres, though visitors should remain aware of boat traffic and potential surf.

Grecian Rocks is a gently sloping reef located within John Pennekamp Coral Reef State Park. The site features a series of shallow coral heads scattered across the seabed, creating a varied topography suitable for both divers and snorkellers. Depths range from 2 to 9 metres, with an average depth of 3 metres. Access to the site is by boat, as it is situated approximately 1207 metres from the shore. Conditions are generally mild, though visitors should be aware of potential surf and sharp coral. The site is well-suited for beginners, with typical dive times lasting around 60 minutes and visibility ranging from 5 to 30 metres.

Banana Patch Reef in John Pennekamp Coral Reef State Park is a shallow reef structure suitable for beginner divers. Located 5000 metres from shore, the site requires boat access. Divers can explore depths ranging from 3 to 12 metres, with an average depth of 8 metres. Visibility typically spans 6 to 10 metres, and the site experiences moderate currents. The reef features a mix of hard and soft corals. Night diving is available at this location. Hazards include boat traffic, jellyfish, and sharp coral structures. Divers should exercise caution during surface intervals and avoid contact with the reef to prevent injury.