Basswood Island Quarry features submerged wooden dock cribs dating back to the 1890s brownstone quarrying era. These historical structures lie in depths ranging from 1 to 8 metres, with an average depth of 4 metres, creating an artificial reef environment. Located 2414 metres from the shore, the site requires boat access. Conditions are variable, with visibility typically between 3 and 12 metres and mild currents. The water remains extremely cold throughout the year, rarely exceeding 19 degrees Celsius. Divers and snorkellers should be aware of potential hazards including boat traffic, entanglement risks, and cold water temperatures. The site is suitable for beginners and offers a 30-minute typical dive duration.

Meyers Beach Sea Caves on the North Shore of Lake Superior offer a unique freshwater snorkeling experience within a series of shallow caves. Located 1600 metres from the shore, the site is accessible by both boat and shore entry. Conditions vary, with moderate currents and potential for low visibility. Due to the overhead environment of the caves and the cold water temperatures, which range from 1C to 18C, this site is suited for intermediate snorkelers. Hypothermia is a significant risk in these waters, and snorkelers should remain aware of boat traffic in the area. Parking and toilets are available at the site.

The Baptism River Mouth on the North Shore of Lake Superior offers a dynamic freshwater snorkeling environment where river and lake waters converge. The site is characterised by large submerged boulders and a rocky reef topography. Snorkelers should be prepared for moderate currents and variable water clarity, which is influenced by river runoff and recent rainfall. Access is via the shore, and the site is best suited for intermediate snorkelers due to the presence of surf, strong currents, and cold water temperatures. Facilities at the location include parking and toilets. Given the water temperatures, which range from 1C to 16C, appropriate thermal protection is essential to mitigate the risk of hypothermia.

The Madiera is a freshwater shipwreck located off the North Shore of Lake Superior. This site offers shore access to a wreck lying at depths between 6 and 33 metres, with an average depth of 20 metres. Divers should be prepared for cold water temperatures ranging from 1 to 12 degrees Celsius, necessitating the use of drysuits or thick wetsuits. Visibility is highly variable, fluctuating between 3 and 24 metres, and the structure presents potential entanglement hazards. Due to the depth and cold conditions, this site is best suited for experienced divers. Guided tours are available and recommended for initial visits to assist with navigation.