The Atlantic is a deep-water wreck located 4828 metres offshore in Lake Erie, resting at depths between 41 and 50 metres. This site is strictly for advanced divers, requiring wreck certification and precise buoyancy control. The wreck structure offers an overhead environment with associated entanglement risks. Visibility is highly variable, ranging from 3 to 18 metres. Divers must contend with mild currents and significant thermal challenges, as bottom temperatures often remain between 3 and 10 degrees Celsius even during summer months. A drysuit with appropriate undergarments is essential for this 40-minute dive. Access is exclusively by boat, and divers should confirm operator availability locally before planning.

The Pascal P. Pratt is a shipwreck located in the Niagara Peninsula of Lake Erie, serving as an artificial reef. The site sits at depths ranging from 6 to 30 metres, with some areas reaching 45 metres. Divers access the wreck by boat, encountering mild currents and visibility between 5 and 15 metres. Due to the depth and potential for entanglement, this site is suited for intermediate divers with appropriate overhead-environment training. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 23 degrees Celsius, necessitating careful thermal planning. Always monitor your depth and remain close to the boat entry point during your dive.

Bluff Bar is a remote sandbar located in the Outer Bay of the Great Lakes, Ontario. This freshwater site features a sandy environment that rises from depths of approximately 8 metres to just inches below the surface. Snorkellers typically experience depths ranging from 1 to 8 metres, with an average of 5 metres. Access to this site requires a boat, as it is situated 3000 metres from the shore. Conditions vary, with mild currents and potential hazards including boat traffic, entanglement, low visibility, and surge. The site is suited for intermediate snorkellers, with a typical visit lasting 45 minutes.

Pottahawk Point is a shallow sandbar located at the boundary of the Inner and Outer Bays in the Great Lakes of Ontario. This site features sandy flats and weed beds, offering a shallow environment for snorkelers with depths ranging from 1 to 5 metres. Access is by boat only, as the site is situated 8 kilometres from the shore. Conditions vary, with visibility typically between 3 and 10 metres and mild currents. Hazards include boat traffic, surge, and cold water temperatures. The site is suitable for beginners, though water temperatures fluctuate significantly throughout the year, peaking in late summer.

Ryerson's Island Shallows is a freshwater site located in the Inner Bay of the Great Lakes and Ontario, Canada. This area features shallow, protected waters surrounding a small island, characterised by a mix of reef and seagrass habitats. The site is suitable for beginners and requires boat access. Water temperatures fluctuate significantly throughout the year, ranging from 1C in the winter months to 23C in August. Facilities available at the site include parking, toilets, and showers. The current is generally mild, making it a manageable location for snorkelling activities.

Monarch's Rest Beach is a shore-entry site located within Long Point Provincial Park. The topography features a sandy bottom that gradually transitions into a drop-off, with depths ranging from 1 to 5 metres and an average of 2 metres. This site is suitable for beginners and offers a typical snorkel duration of 30 minutes. Water temperatures vary significantly throughout the year, reaching up to 23C in August, though conditions remain cold outside of the summer months. Species recorded around this area include various freshwater fish and invertebrates such as snails, blue gill, perch, and crayfish. Facilities at the beach include parking, toilets, and showers. Hazards include cold water, jellyfish, and surf.

The Brown Brothers Wreck is a freshwater shipwreck located in Lake Erie, resting at depths between 20 and 30 metres with an average of 25 metres. This boat-accessible site offers visibility ranging from 5 to 10 metres. Divers should be prepared for cold water conditions, as temperatures fluctuate significantly throughout the year, requiring a drysuit or a thick 7mm wetsuit with hood and gloves. The site is suitable for beginners, though divers must remain aware of entanglement hazards within the structure and carry a cutting tool. There is no current, allowing for a controlled exploration of the wreck's remains.

Millionaires in the Inner Bay is a sheltered freshwater site near the Old Cut channel. The topography consists of a dark, weedy bottom featuring both reef and seagrass habitats. This area is notably warmer and calmer than the open lake, making it suitable for beginners. Divers can access the site from either the shore or by boat. Conditions are generally mild, though water temperatures fluctuate significantly throughout the year, ranging from 1°C in winter to 23°C in August. Facilities available at the site include parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, and boat charters.