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.

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 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.

The China is a wreck dive located in Big Tub Harbour within Fathom Five National Marine Park. The site features a depth range of 3 to 46 metres, requiring intermediate skill levels due to cold water, moderate currents, and rip currents. Visibility varies significantly from 5 to 30 metres. Divers must manage a pronounced thermocline, with temperatures ranging from 2°C to 20°C. Entry is possible from both shore and boat, with the wreck situated 50 metres from the shore. Due to heavy boat traffic, the use of a surface marker buoy is essential. Guided tours are available to assist with navigating potential entanglement risks on the wreck structure.

The Tugs in Big Tub Harbour consist of four small steam tugs resting in shallow freshwater. This site is accessible via a shore-side wooden deck, making it suitable for beginners. The Alice G is the most intact vessel, featuring a visible engine and boiler. Depths range from 3 to 12 metres, with an average of 6 metres. Visibility typically spans 12 to 24 metres. Conditions include mild currents and water temperatures that vary from 1 to 19C. Divers and snorkellers should remain aware of boat traffic in the harbour. Facilities at the site include parking, toilets, and changing rooms.

The Tugs in Big Tub Harbour consists of two historic wooden tugboat wrecks resting in shallow freshwater. Located 50 metres from the shore, the site is accessible via a shore entry and is well-suited for beginner divers. The wrecks lie at depths between 5 and 12 metres, with an average depth of 8 metres. Divers typically experience mild currents and visibility ranging from 5 to 15 metres. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 19 degrees Celsius. Due to the location within an active harbour, divers must remain vigilant regarding boat traffic. Facilities at the site include parking, toilets, and changing rooms.

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.