The Sweepstakes is a schooner wreck located in Big Tub Harbour, Canada. Sunk in September 1885 after being towed following damage near Cove Island, the vessel remains a notable site for divers and snorkellers. The wreck rests at a depth of 7 metres, with most of the hull, deck, centreboard, windlass, and railing still intact, though a portion of the stern deck has collapsed. Situated 50 metres from shore, the site features mild currents and visibility ranging from 5 to 30 metres. Water temperatures are consistently cold, ranging from 1 to 19C. Divers should be aware of boat traffic and cold water hazards.

The City of Grand Rapids is a shallow shipwreck located in Big Tub Harbour, Canada. Resting in depths between 5 and 7 metres, the site is suitable for beginners and accessible by both shore and boat. Conditions are generally calm with no current, and visibility typically ranges from 5 to 10 metres. The wreck structure is well within reach for snorkellers. Water temperatures vary significantly throughout the year, ranging from 1 degree Celsius in winter to 19 degrees Celsius in August. Species recorded around this area include round goby, snail, small mouth bass, pike, common carp, American crayfish, and lake trout.

Big Tub Lighthouse Point, located in Big Tub Harbour, offers a diverse freshwater dive experience combining wall, reef, and wreck topography. Divers can explore depths ranging from 11 to 23 metres. The site is accessible via both shore and boat, though shore entries require navigating surf and shore breaks. Conditions include mild currents and visibility between 10 and 30 metres, though sharp thermoclines and cold water intrusions can cause rapid temperature drops. Due to frequent charter boat traffic in the harbour, the use of a surface marker buoy is essential. Facilities including parking and toilets are available on site to assist with gear preparation.

The W.L. Wetmore is a shipwreck located in Big Tub Harbour within Fathom Five National Marine Park. This freshwater wreck, which sank in 1901, rests at depths ranging from 7 to 30 metres, with an average depth of 15 metres. The site is accessible by both boat and shore entry. Conditions vary, with visibility typically between 5 and 15 metres and mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 19 degrees Celsius. The wreck is situated near the King, another vessel in the harbour, and is suitable for intermediate divers and snorkellers.

The W. L. Wetmore is a shallow wreck located in Big Tub Harbour, Canada. Resting at depths between 5 and 8 metres, this site is suitable for beginner divers. Access is by boat only, and divers should be aware of entanglement hazards within the structure. Visibility typically ranges from 5 to 15 metres, with mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 19 degrees Celsius. Species recorded around this area include round goby, snail, American crayfish, lake trout, small mouth bass, common carp, and pike. Divers should monitor depth gauges closely due to nearby drop-offs reaching 40 metres.

The Philo Scoville is a freshwater wreck located in Big Tub Harbour, Lake Huron. The site features a wreck structure resting at depths between 7 and 30 metres, with an average depth of 15 metres. Divers can access the site via shore or boat. Conditions include mild currents and visibility ranging from 5 to 15 metres. Water temperatures fluctuate significantly by season and depth, often reaching 4°C at depth year-round. Due to the wreck's structure, divers should maintain buoyancy control to avoid entanglement hazards. Surface boat traffic requires constant awareness during the dive.

The Anchor is a freshwater wreck and reef site located in Big Tub Harbour, Lake Huron. Divers can explore the structure at depths between 21 and 22 metres. The site offers visibility ranging from 10 to 30 metres and features a mild current, making it suitable for intermediate divers. Shore entry provides straightforward access, with parking and toilets available on site. Due to the nature of the wreck, there is a risk of entanglement; divers should maintain awareness of their positioning. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 19 degrees Celsius, and thermoclines may be present.

Tobermory, located in Ontario's Georgian Bay, provides shore-based reef diving in shallow water. The site is accessible year-round directly from the shore, making it a convenient option for divers who prefer to avoid boat entries. While conditions vary, the site is generally suitable for beginners who can move at their own pace. Divers should wear thick-soled boots to protect their feet from sea urchins during entry. Be aware that moderate currents can occur, and visibility may shift depending on weather and the time of year. The habitat supports a variety of temperate reef fish and invertebrates typical of the region.