The SS Appomattox is a freshwater wreck site accessible via a shore entry. Divers typically navigate to the centermost buoys, where lines lead to training platforms at 6m. The site features depths ranging from 5m to 12m, with an average depth of 7m. Conditions vary, with visibility between 2m and 6m. A thermocline is generally present at 6m, where water temperatures drop to approximately 15.5°C. During summer months, surface water temperatures range from 18°C to 24°C. Divers should be aware of potential boat traffic, cold water, and low visibility. Parking is available along Edgehill Drive, with gear loading permitted at the boathouse.

Governor's Island is a peninsula on the north shore of Lake Mendota, United States, characterised by high rocky bluffs. The site offers a vertical underwater environment where the lake floor drops to depths of 25 metres, with an average depth of 8 metres. Snorkellers access the water from the shore. Conditions are variable, with visibility typically ranging between 2 and 6 metres. Due to the depth and potential for cold water and thermoclines, this site is suited for intermediate snorkellers. Parking is available for visitors. The site is rated 3 out of 5 for snorkelling activities.

Devil's Lake is a freshwater dive site located in the United States, offering shore access for divers. The site features an artificial reef structure with depths ranging from 7 to 18 metres, averaging 7 metres. Visibility at the site typically spans 5 to 10 metres. Water temperatures fluctuate significantly, ranging from the low 30s°F in winter to the mid-70s°F during summer months. A 7mm wetsuit is generally recommended for dives between May and October. Divers should be aware of hazards including deep water and potential entanglement. Facilities available at the site include parking and toilets.