Bruno's Reef is a rocky freshwater site located in Malletts Bay, Lake Champlain, situated between Coates Island and Marble Island. The reef features depths ranging from 6 to 11 metres. Access is by boat only, and the site is suited for advanced divers due to cold water conditions and variable visibility between 3 and 9 metres. A drysuit is recommended for this environment. While primarily a dive location, the shallower crests of the reef can be accessed by snorkelers. Species recorded around this area include snails, small mouth bass, and freshwater drum. Divers should remain aware of boat traffic in the area.

Beer Can Island is a shallow, rocky island located near the mouth of Malletts Bay in Lake Champlain. The site reaches a maximum depth of approximately 5 metres. Access is by boat only, as the site is situated 8,000 metres from the shore. Snorkellers can expect visibility ranging from 3 to 9 metres. Due to the nature of Lake Champlain, the water remains cold, with temperatures typically ranging from the 40s to the mid-60s Fahrenheit in late summer. Drysuits are recommended for comfort. Hazards at this site include cold water and low visibility. This location is suitable for beginners.

The Cut is a 200-foot gap in the historic railroad causeway at Lake Champlain, serving as an artificial reef. The site features rocky crevices that provide habitat for various temperate freshwater fish and invertebrates. Divers and snorkellers can expect depths ranging from 2 to 6 metres, with an average of 4 metres. Access is via the shore, and the site is suitable for intermediate divers. Conditions include moderate currents, cold water, and potential boat traffic. The site is well-suited for night diving and offers a 4/5 rating for snorkelling. Typical dives last approximately 30 minutes. Facilities available at the site include parking and toilets.

The Phoenix is a freshwater wreck and artificial reef located in Lake Champlain. The site spans a depth range from 5 metres to 33 metres, with an average depth of 28 metres. Due to the significant depth and variable visibility of 3 to 9 metres, this site is suited for advanced divers. Cold water is present year-round, and a drysuit is strongly recommended. Access is by boat only, and divers must maintain high situational awareness regarding boat traffic. Proper decompression procedures and careful gas management are essential for this 40-minute typical dive profile. Divers should deploy a surface marker buoy before ascending to ensure safety.

Colchester Reef in Lake Champlain features the submerged stone-filled crib foundation of the original lighthouse. This site consists of three shoals known as the Middle Bunch, offering a range of depths from 2 to 40 metres. Access is by boat only, located 2414 metres from the shore. Divers and snorkellers should be prepared for variable conditions, including thermoclines and visibility ranging from 3 to 12 metres. Due to the depth and potential for cold water, this site is suited for advanced divers. Hazards include boat traffic, low visibility, and cold water temperatures that remain constant in the mid-40s Fahrenheit at greater depths.

Lone Rock Point features the Champlain Thrust Fault, where 450-million-year-old rock formations meet the water. This shore-entry site consists of underwater boulders and crevices that create a complex reef-like topography. Depths typically range from 1 to 10 metres, with an average of 5 metres. Divers and snorkellers should be aware of variable conditions including cold water, thermoclines, surge, and surf. Due to the presence of boat traffic, appropriate surface markers are recommended. Species recorded around this area include snails, freshwater drum, small mouth bass, lake trout, and rock bass. Parking is available for visitors.

The Burlington Bay Horse Ferry is a historic wreck site resting at a consistent depth of 15 metres in Lake Champlain. As an artificial reef, the structure features deteriorating timbers and remnants of the original horse-powered ferry. Divers should note the overhead environment and potential entanglement risks from loose rigging and wood. Visibility typically ranges from 5 to 9 metres, and water temperatures remain cold throughout the year. Due to these conditions and the risk of entanglement, this site is suited for intermediate divers. Guided tours are available to assist with navigation around the wreck. Divers must remain vigilant for boat traffic when surfacing.

Niquette Bay, specifically the Calm Cove area of Lake Champlain, offers a protected freshwater snorkelling environment. The site features a rocky shoreline that transitions into thick aquatic plant beds. With depths ranging from 1 to 5 metres and an average depth of 3 metres, it is well-suited for beginners. The water conditions are generally calm with mild currents, though snorkellers should remain aware of potential boat traffic in the area. Access is via the shore, with parking facilities available nearby. A typical snorkelling session lasts approximately 45 minutes.