Billy's Reef is a freshwater site located in the United States near Clear Lake, featuring a rocky bottom and artificial reef structures. Access is restricted to boat entry only. The site is suited for advanced divers due to the challenging conditions, which include low visibility of approximately one metre and depths ranging from three to nine metres. Divers should be prepared for cold water temperatures, which typically hover between 4°C and 7°C in early April. Hazards at this location include deep water, potential entanglement, and limited visibility. Facilities available on-site include parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, a cafe, first aid, a dive shop, boat charters, and guided tours.

City Beach and Water Plant Rock Pile is an artificial reef located in freshwater near the water plant and city dock. The site consists of a rock pile with an average depth of 4 metres, ranging from 2 to 9 metres. Due to the low water temperature of approximately 6°C, a wetsuit is required for safety and comfort. Access is available from both shore and boat. Snorkellers should exercise caution regarding extreme boat traffic and potential entanglement hazards. Facilities at the site include parking, toilets, and showers. This location is suited for intermediate snorkellers.

McIntosh Woods Peninsula Beach is a freshwater site situated on a peninsula within McIntosh Woods State Park. The topography consists of a natural sandbar and patches of submerged vegetation. Suitable for beginners, the site offers depths ranging from 1 to 3 metres, with an average depth of 3 metres. Visibility is limited, reaching up to 1 metre. Entry is via the shore. Visitors should remain cautious of boat traffic in the area. On-site facilities include parking, showers, changing rooms, a rinse station, air fills, a dive shop, and boat charter services.

Big Blue is a clay quarry site in the United States featuring a small beach for shore entry. The site is designed for training and exploration, containing three underwater platforms and two sunken boats. Divers can expect depths ranging from 0 to 10 metres. Conditions include mild currents and visibility reaching up to 3 metres. The bottom consists of silt, which requires careful buoyancy control. Water temperatures fluctuate significantly, reaching 21 to 24 degrees Celsius in summer and 7 to 21 degrees Celsius during spring. Facilities at the site include parking, toilets, showers, and changing rooms. This location is suitable for beginners.