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 Dunkirk Harbor Breakwall in Lake Erie offers a sheltered environment for snorkelers along its artificial structure. This site features a wall and rocky crevices that provide a distinct habitat within the Buffalo Harbor and Niagara River area. Entry is via the shore, and the site is suitable for beginners. Conditions vary, with water temperatures ranging from 2C to 23C throughout the year. Divers and snorkelers should be aware of potential hazards including cold water and low visibility. Parking and toilets are available at the site. A typical visit lasts approximately 45 minutes.

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.

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.

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.

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.

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.