Devil's Den is a karst fenster, or karst window, located in Crystal River. This subterranean river site features a constant water temperature of 22°C. Divers and snorkellers access the water via a shore entry to explore the cavern environment, which includes various swim-throughs. The site reaches depths between 2m and 16m, with an average depth of 8m. Visibility typically ranges from 10m to 30m. Facilities on-site include a dive shop, air fills, equipment rental, showers, and changing rooms. Due to the overhead environment and depth, this site is suited for intermediate divers. Night diving is permitted, and the site is highly rated for snorkelling.

Blue Grotto Spring in Crystal River is a cavern dive site offering a consistent year-round water temperature of 22°C. Divers enter from the shore to explore depths ranging from 7m to 30m, with an average depth of 15m. Visibility typically spans 15m to 30m. The site features an overhead environment, requiring appropriate training and caution regarding entanglement hazards. Facilities on-site include parking, toilets, showers, changing rooms, a dive shop, and air fills. Guided tours are available for those navigating the cavern. The environment supports various freshwater flora and fauna typical of the region, including sponges, crustaceans, and freshwater fish species.

Forty Fathom Grotto is a deep freshwater site in Crystal River, Florida, designed for advanced divers with technical or cave certifications. The topography includes a combination of cave passages, artificial reef structures, and a wreck. Divers enter from the shore to explore depths ranging from 3 to 73 metres, with an average depth of 30 metres. Conditions include mild currents and visibility between 3 and 18 metres. Water temperatures vary with depth, becoming colder at the bottom. Due to the overhead environment and significant depth, divers must maintain strict buoyancy and gas management. Facilities on-site include a dive shop, air fills, showers, changing rooms, and parking.

Rainbow Spring is a freshwater drift site located in Central Florida Springs near Ocala. The spring run offers a shallow experience with depths ranging from 2 to 8 metres, averaging 3 metres. Divers and snorkellers can enjoy visibility between 10 and 60 metres as they move with a mild current. The site features cavern topography suitable for beginners, with shore and boat entry options available. Facilities at the location include parking, toilets, showers, changing rooms, and a cafe. Divers should remain aware of boat traffic when entering or exiting the water and be prepared for shifting currents throughout the drift.

KP Hole Park serves as an entry point for drift diving the spring-fed Rainbow River. This freshwater site features depths reaching 7 metres with an average of 3 metres. Divers experience mild currents and visibility ranging from 30 to 60 metres. Access to the river requires a boat, and the site is suited for intermediate divers. Facilities at the park include parking, toilets, showers, changing rooms, a cafe, and equipment rental. Species recorded around this area include Longnose Gar, Redbreast Sunfish, Blue Gill, Large Mouth Bass, snails, Redear Sunfish, and livebearers. Divers should remain aware of boat traffic and potential entanglement hazards during their 60-minute dives.

KP Hole is a freshwater spring run in Crystal River, Florida, offering a gentle drift experience suitable for beginners. The site features depths ranging from 2 to 7 metres, with an average of 3 metres. Divers and snorkellers enter from the shore, allowing the mild current to carry them downstream. Visibility is variable, ranging from 23 to 76 metres. The site includes facilities such as parking, toilets, showers, and changing rooms. Due to the overhead environment and boat traffic near the entry point, constant vigilance is required. Species recorded around this area include longnose gar, large mouth bass, blue gill, redbreast sunfish, snails, redear sunfish, and livebearers.

Rainbow River is a freshwater drift dive located in Crystal River, United States. The site features a riverbed characterized by spring vents and grass beds, with a small cavern located at the end of the drift. Divers can expect depths ranging from 3 to 7 metres, with an average depth of 3 metres and a maximum of 7.6 metres. Visibility is high, typically between 30 and 60 metres. The dive requires boat access and is suitable for beginners, with mild currents and a typical dive duration of 60 minutes. Night diving is permitted. Divers should remain aware of boat traffic throughout the area.

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.