The Crack at Baird Creek is a zigzag fissure in the limestone floor that emits spring water. Located 1609 metres from shore, this site requires boat access to reach the formation. Snorkellers can explore depths ranging from 2 to 15 metres, with an average depth of 4 metres. Conditions vary, with visibility typically between 5 and 15 metres and mild currents present. The site is suited for intermediate snorkellers due to hazards including boat traffic, potential for low visibility, and the overhead environment of the fissure. Facilities available at the location include parking, toilets, and showers.

Eagle's Nest is a submerged karst cave system in Crystal River, Florida, known for its extreme technical demands. The site features a shallow basin at 21 metres that leads into a vertical shaft descending to 95 metres. Divers encounter strong currents and variable visibility between 10 and 30 metres. Due to the significant depth and overhead environment, this site requires full cave certification and precise decompression planning. A thermocline is present, with surface waters warmer than the depths. Facilities at the shore entry point include parking and toilets. Divers must manage risks including nitrogen narcosis, entanglement, and decompression obligations throughout the 45-minute average dive duration.

Joe’s Sink in Crystal River is a freshwater cavern dive offering depths ranging from the surface to 18 metres. Divers enter directly from the shore into a system characterised by mild currents and visibility typically around 6 metres. The environment features dense aquatic plants, which present an entanglement risk, requiring careful buoyancy control and gear management. Divers should remain within the light zone and avoid disturbing the silt to maintain visibility. The site is suitable for beginners with an open water certification, though the variable visibility and cavern topography require attention. The habitat supports various freshwater fish and invertebrates, though specific species sightings are not confirmed.

Hospital Hole is a submarine sinkhole located 300 metres from the shore in the Crystal River area. This site features a cavernous topography with depths ranging from 2 to 15 metres, averaging 10 metres. Access is exclusively by boat. Conditions vary, with visibility between 2 and 12 metres and mild currents. The water temperature fluctuates significantly throughout the year, ranging from 16C in January to 31C in July and August. The site is noted for being slightly warmer than the surrounding river, providing a thermal refuge. Hazards include boat traffic, deep water, low visibility, and overhead environments. Snorkelling is possible, though the site is primarily a cavern and cave environment.

Weeki Wachee Spring is a cave system located in Crystal River, offering diving and snorkelling experiences in a freshwater environment. The site features depths ranging from 6 to 14 metres, with an average depth of 10 metres. Divers and snorkellers can expect visibility between 18 and 30 metres. Access is via the shore, and the site is suitable for beginners, though it presents hazards including deep water, an overhead environment, and moderate currents. Diving and snorkelling are permitted in the main spring area by reservation only and must be conducted with a park-authorised dive shop or organisation. Facilities on-site include parking, toilets, showers, a rinse station, and a cafe.

The Jewel is a freshwater cave system in Crystal River, Florida, offering a significant vertical range between 7 and 96 metres. This site is reserved for advanced divers with cave certification and overhead-environment experience. Entry is via shore, leading into complex passages where visibility can reach 30 metres but may drop to zero if silt is disturbed. Divers must manage mild currents and potential surges throughout the dive. Due to the overhead environment, direct ascent is not possible. Precise buoyancy control is essential to prevent siltation and mitigate risks associated with deep cave exploration and potential entanglement.

King's Spring is a cave dive site located in the freshwater spring system of Crystal River. The site features depths ranging from 5 to 20 metres, with an average depth of 10 metres. Divers experience mild currents and visibility typically between 5 and 10 metres, though conditions can shift. Access is by boat only, requiring careful attention to surface boat traffic. The water temperature remains a constant 22 degrees Celsius year-round. Species recorded around this area include West Indian manatee, Atlantic tarpon, drum, croaker, whiptail stingray, Atlantic spadefish, toadfish, snake eel, honeycomb cowfish, spotfin burrfish, bream, needlefish, crab, slippery dick, and lizardfish. Air fills and a dive shop are available.

King Spring is a cavern site located at the head of Crystal River. As the largest spring-head in Kings Bay, it features a diameter of 60 metres and reaches depths of up to 20 metres, with an average depth of 8 metres. Divers and snorkellers can expect mild currents and visibility ranging from 2 to 11 metres. The water temperature remains a constant 22 degrees Celsius year-round. Access to the site requires a boat, which can be rented at a nearby dive shop or brought privately. Hazards include boat traffic, potential entanglement, and variable visibility. Facilities at the site include air fills, parking, and guided tours.