Black Hole is a deep cave, cavern, and drop-off system located off the coast of Naples. The site features a significant depth range from 20 to 68 metres, requiring advanced technical skills and mandatory cave certification. Divers navigate an overhead environment where visibility fluctuates between 10 and 50 metres. The site is accessible only by boat, situated over 43 kilometres from shore. Due to the depth and potential for temperatures as low as 18C, drysuits or thick wetsuits are recommended. The habitat supports various reef fish and invertebrates. Divers must maintain strict depth management and remain alert for shark activity throughout the dive.

Naples Barge is an artificial reef and wreck site located in the United States. The site sits at a shallow depth, ranging from 5 to 8 metres, with an average depth of 5 metres. Access is strictly by boat, as the site is situated approximately 22.5 kilometres from the shore. Divers can expect mild currents, though visibility is variable, ranging from 5 to 50 metres. The site is suitable for beginners, with typical dives lasting around 45 minutes. The habitat supports a variety of reef fish and invertebrates typical of the region. Hazards at this site include potential entanglement and periods of low visibility.

R Tower is an artificial reef located off the coast of Naples, United States. The site features a wall structure that descends from 3 metres to a maximum depth of 21 metres. Divers access this location by boat, navigating a site that experiences mild currents and visibility ranging from 5 to 10 metres. While suitable for beginners, the depth requires careful monitoring to mitigate nitrogen narcosis. The artificial framework presents potential entanglement hazards, and divers should remain aware of the presence of sharks. Water temperatures are comfortable, fluctuating between 21 and 29 degrees Celsius throughout the year. The habitat supports a variety of reef fish and invertebrates.

Red Zone is an artificial reef located within the northern section of the site known as the Swamp, part of Collier County's fourth artificial reef deployment. Established in 2003, the site consists of several large piles of miscellaneous concrete debris. Divers can expect depths ranging from 10 to 13 metres, with an average depth of 13 metres. Access to this site requires a boat, as it is situated 16 kilometres from the shore. Conditions at the site are variable, with visibility ranging between 4 and 15 metres and fluctuating currents. Due to the presence of boat traffic, divers should exercise caution during their ascent and descent.