Rock Point Fossil Shelf is a unique geological site featuring a 350-million-year-old Devonian coral reef embedded within a flat limestone shelf. Snorkellers can observe prehistoric fossils, including horn corals and crinoids, directly on the lake floor. The site is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Access is via a shore entry. Conditions include moderate currents, and snorkellers should be aware of potential rip currents and cold water temperatures. Facilities at the site include parking, toilets, showers, changing rooms, a cafe, and guided tours.

Mohawk Island is a limestone outcrop located off the Niagara Peninsula near Port Maitland. The site features the ruins of an 1848 lighthouse and offers both natural reef and artificial reef structures. The surrounding waters are shallow with rocky bottom sections. Divers and snorkellers should note that access to the island is restricted during the bird nesting season from April to August. Water temperatures fluctuate significantly throughout the year, ranging from 2C in February to 23C in August. This site is suitable for intermediate divers and requires boat access. The habitat supports various temperate freshwater fish and invertebrates typical of the Great Lakes region.

James N. Allan Provincial Park, also known as Pebble Beach, offers a shallow freshwater shore dive along the Niagara Peninsula. The site features a rugged shoreline composed of pebbles and sand, with a shallow sandbar extending hundreds of metres into the water. Divers can expect depths ranging from 1 to 5 metres, with an average depth of 3 metres. Conditions are generally mild, though divers should remain aware of potential entanglement hazards. This site is suitable for beginners and provides easy shore access with parking available nearby. Due to the shallow nature of the sandbar, it is also accessible for snorkelling.

The Carlingford is a freshwater wreck located in Lake Erie, resting at depths between 20 and 30 metres. This site is accessible by boat only and requires advanced and wreck certification due to the overhead environment and potential for entanglement. Visibility typically ranges from 5 to 15 metres, and divers should be prepared for mild currents. Water temperatures fluctuate significantly from 2 to 23 degrees Celsius, with thermoclines often present at depth. Divers should use appropriate thermal protection and monitor their bottom time closely to manage risks associated with cold water, nitrogen narcosis, and decompression. The surrounding habitat supports various temperate freshwater fish and invertebrates.

Sugarloaf Harbour Breakwall is an artificial reef site located in the Niagara Peninsula near Port Colborne. The site consists of a main breakwall providing extensive rocky structure that extends to depths of 15 metres, with an average depth of 10 metres. Conditions vary, with visibility ranging from 3 to 10 metres and moderate currents. Water temperatures fluctuate significantly throughout the year, from 2C in winter to 23C in August. Entry is possible from both shore and boat. Due to the depth and current conditions, this site is suited for advanced snorkelers.

Nickel Beach, located on the Niagara Peninsula, offers a shallow freshwater shore dive suitable for beginners. The site features a reef structure at the eastern end, which provides better visibility than the surrounding sandy areas. Divers can expect depths ranging from 1 to 2 metres. Conditions vary significantly, with visibility between 3 and 10 metres and moderate currents. Water temperatures fluctuate from 2C in winter to 24C in August, requiring thermal protection outside of the summer months. Hazards include cold water, surf, rip currents, and low visibility. Facilities at the beach include parking, toilets, and a cafe.

The C. B. Benson is a freshwater wreck dive located in Lake Erie, resting at depths between 24 and 26 metres. Accessible only by boat, this site is suited for intermediate divers. Visibility is variable, ranging from 5 to 15 metres. The wreck provides an artificial reef habitat for various temperate freshwater fish and invertebrates. Divers should be aware of the risk of entanglement when navigating the structure and carry a cutting tool. Water temperatures fluctuate significantly throughout the year, requiring careful selection of exposure protection. A surface marker buoy is recommended for the ascent, particularly during periods of active boat traffic on the lake.

Ontario St Bridge is a shallow artificial reef site located in the Niagara Peninsula, Canada. The site features a consistent depth of 5 to 7 metres, making it suitable for beginner divers. Shore access is straightforward with on-site parking available for easy equipment preparation. Visibility typically ranges from 5 to 10 metres. Water temperatures fluctuate significantly throughout the year, ranging from 2 to 23 degrees Celsius, requiring appropriate thermal protection such as a drysuit outside of the summer months. Night diving is also permitted at this location, offering a different perspective of the artificial structure.