The Ash Island Barge is a freshwater wreck dive located in the Thousand Islands, Canada. Resting at depths between 24 and 40 metres, with an average depth of 30 metres, this site is suited for intermediate divers. Access is by boat only. Divers should be prepared for moderate currents and visibility ranging from 5 to 10 metres. The wreck structure presents hazards including entanglement risks, boat traffic, and the potential for rapidly changing visibility. A typical dive lasts 40 minutes. Due to the depth and environmental conditions, divers should confirm surface marker buoy requirements and establish a clear ascent plan before descending.

Landon Bay in the Thousand Islands offers a freshwater dive experience featuring a large, flat granite rock that extends into the water, serving as a natural platform for shore entries. The bay is characterised by its shallow, broad topography, which functions as a nursery for local aquatic life. Divers can expect to encounter typical temperate freshwater fish and invertebrates within this habitat. Conditions at this site are variable, with water temperatures ranging from 2C to 23C throughout the year. Due to the presence of boat traffic and strong currents, divers should exercise caution. The site is suitable for beginners and provides facilities including parking and toilets.

Ivy Lea Campground Beach is a shore-entry dive site located in the Thousand Islands region of the St. Lawrence River. The topography consists of a mix of reef, wall, and artificial reef structures. Divers can explore depths ranging from 1 to 27 metres, with an average depth of 10 metres. Visibility typically fluctuates between 3 and 10 metres. Due to the potential for cold water, strong currents, and entanglement hazards, divers should remain aware of their depth and air consumption. The site features on-site parking and showers, facilitating straightforward kit-up and post-dive procedures. The habitat supports various temperate freshwater fish and invertebrates.

Joel Stone Beach in Gananoque provides a convenient shore entry for snorkelling in the Thousand Islands. The site features a sandy entry point leading to rocky bottom formations and a deep-water swim dock. Water temperatures fluctuate significantly throughout the year, ranging from 2°C in winter to 23°C in August. The swimming season typically occurs between July and September when temperatures remain above 20°C. Due to the presence of deep water and active boat traffic, snorkellers should exercise caution while exploring the area. Facilities available at the beach include parking, toilets, and showers.

Kinghorn is a freshwater wreck dive located 122 metres from shore in the Thousand Islands. The site sits at a uniform depth of 27 metres and is strictly for advanced divers holding deep certification. Access is exclusively by boat charter. Divers must manage strong currents and variable visibility ranging from 5 to 10 metres. Due to the combination of deep water, significant current, and active boat traffic, divers should coordinate descents and ascents closely with their charter crew. Always check current conditions before entry, as they can shift significantly and impact both penetration safety and ascent profiles.

Rockport Wall is a freshwater site in the St. Lawrence River featuring a granite wall, drift diving, and wreck exploration. The site offers a wide depth range from 3 to 76 metres, making it suitable for intermediate divers. Shore entry is available near Cornwall's Pub. Conditions vary, with visibility ranging from 5 to 30 metres and moderate currents. The upper shelves between 3 and 6 metres provide rock formations suitable for snorkelling. Divers should be aware of boat traffic, the significant depth, and strong currents. Facilities including parking, a cafe, and a dive shop are located nearby.

The Keystorm is a wreck located in the St. Lawrence River, resting at depths between 6 and 35 metres. This freshwater site requires boat access and is situated 1609 metres from shore. Divers encounter moderate currents and visibility ranging from 5 to 15 metres. The wreck features an overhead environment, necessitating careful buoyancy control and awareness of entanglement risks. Water temperatures vary significantly, reaching up to 21°C in summer but dropping to near freezing in early spring and late autumn. A drysuit or thick wetsuit is recommended. The site is suitable for intermediate divers, and night diving is permitted for those with appropriate experience and equipment.

American is a drift dive located in the St. Lawrence River. The site maintains a consistent depth of 9 metres, making it manageable for divers to monitor their position. Access is by boat, and the site is characterised by strong currents that require careful planning of the drift path and pickup arrangements. Visibility typically ranges between 5 and 10 metres. Due to the cold water temperatures, adequate thermal protection is essential for all divers. Divers should be prepared for the current to carry them away from the entry point and should confirm all boat logistics locally before entering the water.