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.

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.

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.

The 17 Fathom Wreck is a deep-water site located 19 kilometres offshore in Lake Erie, accessible only by boat. Resting at a depth of 32 to 33 metres, this wreck requires advanced diving skills and strict buoyancy control. Divers encounter mild currents and visibility ranging from 5 to 15 metres. Water temperatures fluctuate significantly throughout the year, from 1 degree Celsius in winter to 23 degrees Celsius in August, necessitating careful thermal protection planning. Due to the depth, cold water, and potential for entanglement within the structure, this site demands high levels of wreck-diving discipline and experience.

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.

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.

Trade Wind Wreck is a deep freshwater shipwreck located 18.5 kilometres offshore in Lake Erie. This advanced dive site features a wreck resting at depths ranging from 6 to 37 metres, with an average depth of 37 metres. Access is strictly by boat. Divers should be prepared for challenging conditions, including cold water temperatures that can drop to 5 degrees Celsius at the bottom, and visibility that fluctuates between 5 and 18 metres. Due to the depth and the nature of the structure, potential hazards include entanglement and low visibility. This site is suitable only for experienced divers with appropriate training for deep, cold-water wreck penetration.

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.