Hunter Spring is a freshwater spring basin in Crystal River, United States, offering a calm environment for divers. The site features a shallow depth of 4 to 5 metres, making it suitable for beginners to practice buoyancy. Shore entry is straightforward, with on-site facilities including parking, toilets, and changing rooms. Visibility typically ranges from 5 to 15 metres. Divers should remain aware of boat traffic when entering or exiting the water and avoid submerged lines to prevent entanglement. While the aquifer maintains a consistent temperature, deeper pockets can feel cooler, so appropriate thermal protection is recommended. Surface marker buoys are advised due to active vessel movement in the area.

Hunter Springs Park in Crystal River is a shore-access site featuring a small beach and a designated roped-off swimming area. It serves as a primary location for snorkelling and diving in the region. The site reaches depths of 1 to 6 metres, with an average depth of 5 metres. Water temperatures remain a constant 22 degrees Celsius year-round due to the natural springs, though seasonal fluctuations in the surrounding area range from 16 to 31 degrees Celsius. Visibility typically varies between 5 and 15 metres. Facilities available on-site include parking, toilets, showers, changing rooms, and a rinse station. Potential hazards at this site include jellyfish, sea urchins, and stonefish.

Three Sisters Springs in Crystal River is a natural spring system serving as a warm-water refuge. The site features depths ranging from 1 to 18 metres and is accessible via shore entry. Visibility varies significantly, fluctuating between 5 and 30 metres depending on conditions. The water maintains a consistent temperature of 23°C throughout the year. This location is suitable for beginners and accommodates both diving and snorkelling activities. Facilities available on-site include parking, toilets, showers, changing rooms, rinse stations, and equipment rental. Guided tours and boat charters are also available for those exploring the area.

Crystal River offers shallow, shore-entry snorkelling in depths ranging from 1 to 4 metres. The site features seagrass beds and artificial reef structures, providing a habitat for species including West Indian manatee, Atlantic tarpon, whiptail stingray, bream, needlefish, crab, mullet, large mouth bass, snail, blue gill, and livebearer. Conditions are generally mild, though visibility can fluctuate between 1 and 15 metres. Beginners are well-suited to this environment, which is accessible without certification. Snorkellers should remain vigilant regarding boat traffic in the area. Facilities available at the site include parking, showers, and guided tours.

American Pro in Crystal River offers a diverse underwater environment ranging from 3 to 36 metres. This site features a combination of open reef, cavern, and cave sections, often experienced as a drift dive due to strong currents. With visibility reaching 60 metres, the site requires advanced buoyancy control and the ability to navigate shifting water movement. Shore entry provides access to the area, which is supported by full facilities including air fills, equipment rental, and showers. Due to the significant vertical profile and overhead environments, this site is suited for intermediate divers with appropriate technical training for cave and cavern sections.

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.

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.

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.