Catfish Hotel Sink is a freshwater cavern located in Crystal River, United States. This site offers depths ranging from 2 to 8 metres, making it accessible for beginner-level cavern divers. Divers enter from the shore to explore the overhead environment, which requires specific cavern certification. Visibility at the site typically ranges between 10 and 30 metres. The water temperature remains a constant 21 to 22 degrees Celsius year-round. Facilities available at the location include parking, toilets, showers, changing rooms, a rinse station, and an on-site dive shop. Divers should remain aware of potential entanglement risks and disorientation associated with the overhead environment.

Fanning Springs State Park features a large basin with three distinct entrance points, offering a freshwater environment suitable for both divers and snorkellers. The site reaches depths of 2 to 6 metres, making it accessible for beginners. Divers can explore the spring boil, with water temperatures remaining a constant 22 degrees Celsius throughout the year. Visibility typically ranges from 10 to 30 metres, though conditions can vary. Entry is via the shore, and the site experiences mild currents. Facilities available on-site include parking, toilets, showers, and changing rooms. Divers should remain aware of potential boat traffic in the area.

Hart Springs is a large spring-fed site in the Big Bend region, featuring three distinct boils. The area offers a shallow run leading toward the Suwannee River, characterised by aquatic vegetation. Snorkellers can expect depths ranging from 2 to 9 metres, with an average depth of 5 metres. Visibility at the site typically fluctuates between 10 and 30 metres. Access is via the shore, and the site is suitable for beginners. Be aware that moderate to strong currents may be present. On-site facilities include parking, toilets, showers, changing rooms, equipment rental, a cafe, and options for boat charters or guided tours.

Rock Bluff Springs is a second-magnitude spring located in Florida, United States. The site features multiple vents situated within a large pool surrounded by ancient cypress trees. Divers and snorkellers can explore depths ranging from 1 to 9 metres, with an average depth of 5 metres. Conditions are variable, with visibility typically between 3 and 12 metres and mild currents. Access is available from both the shore and by boat. The site is suitable for beginners, with typical dive times lasting around 60 minutes. Facilities provided at the location include parking and toilets.

Atsena Otie Key is a historic island located 805 metres offshore from the Nature Coast. This marine site features shallow seagrass beds and oyster bars, making it suitable for beginner snorkellers. Access to the site requires a boat. Conditions vary, with depths reaching up to 3 metres and visibility typically ranging between 2 and 4 metres. Divers and snorkellers should be aware of moderate currents and potential hazards including entanglement, jellyfish, sea urchins, sharks, sharp coral, stonefish, and low visibility. Water temperatures fluctuate significantly throughout the year, ranging from 16C in winter months to 31C in August.

Ginnie Ballroom is a freshwater cavern and cave site located within the Devil’s Spring System. Divers and snorkellers access the site via a shore entry, experiencing depths ranging from 5 to 15 metres with an average of 10 metres. The site features high visibility of up to 60 metres, though conditions include moderate currents, cold water, and an overhead environment. The area is suitable for beginners, with typical dives lasting 20 minutes. Species recorded around this area include longnose gar, redbreast sunfish, blue gill, large mouth bass, perch, livebearer, mullet, snail, pike, and redear sunfish. Facilities include parking, toilets, showers, changing rooms, air fills, equipment rental, a dive shop, and a cafe.

The Ballroom is a freshwater cavern and cave system located in the Nature Coast region of the United States. Divers access the site via the shore, entering a space that ranges from 4 to 15 metres in depth, with an average of 12 metres. The site features mild currents and visibility typically between 15 and 30 metres. It is suitable for beginners and supports night diving, with a typical dive duration of 50 minutes. Species recorded around this area include longnose gar, redbreast sunfish, blue gill, large mouth bass, perch, livebearer, mullet, snail, pike, and redear sunfish. On-site facilities include parking, toilets, showers, changing rooms, a rinse station, air fills, and equipment rental.

Gilchrist Blue Springs is a second-magnitude spring located in Florida. The site features a shallow spring run with eelgrass and a constant water temperature of 22°C year-round. Divers and snorkellers can expect visibility ranging from 15 to 25 metres. The site is accessible via shore entry and is suitable for beginners, with depths typically between 1 and 7 metres, averaging 4 metres. Typical dives last around 45 minutes. Facilities available on-site include parking, toilets, showers, changing rooms, equipment rental, and a cafe. Be aware of potential hazards including deep areas and down currents.