Splatt Bay is a sheltered freshwater site located on the Niagara Peninsula, situated just east of the Grand River mouth. This rocky reef environment offers a quieter alternative to the main sandy beach near the Port Maitland pier. Snorkellers can explore depths ranging from 1 to 5 metres, with an average depth of 3 metres. Entry is via the shore, and conditions feature mild currents and visibility between 2 and 6 metres. The site is suitable for beginners, though users should be aware of cold water temperatures and potential surf. Facilities including parking, toilets, and showers are available for visitors.

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.

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.

The Wilma Wreck is a freshwater dive site located in the Niagara Peninsula region of Lake Erie. This wreck sits at depths ranging from 3 to 74 metres, with an average depth of 23 metres, making it suitable for intermediate divers. Visibility typically ranges between 5 and 15 metres. Access is by boat only, located approximately 16 kilometres from shore. Divers should be prepared for mild currents and potential entanglement hazards within the structure. Due to significant temperature fluctuations between 1 and 23 degrees Celsius, drysuits are strongly recommended. The site supports a variety of temperate freshwater fish and invertebrates typical of the Great Lakes habitat.

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.