Staghorn Cliffs in Skaneateles Lake features a massive Devonian-era fossilized coral reef embedded within the shale cliffs. Divers and snorkellers can observe horn coral fossils, known as Rugosa, both within the rock face and scattered across the lake floor. The site is accessible only by boat and is suitable for intermediate divers. Depths range from 2 to 10 metres. Visibility is variable, typically starting at 6 metres. Water temperatures fluctuate significantly, with summer surface temperatures reaching 16 to 24°C, while spring and autumn temperatures can drop to 3 to 5°C. A thermocline typically forms at approximately 10.7 metres, creating colder conditions below.

Frontenac Island is one of only two islands located in the Finger Lakes. Situated off Union Springs, the site features a limestone base that contains unique stromatoporoid fossils. The rocky habitat surrounding the island provides a distinct underwater environment for snorkelers to explore. Access to this site is by boat, and it is best suited for intermediate snorkelers due to the nature of the location. As a freshwater site in Cayuga Lake, the topography is defined by its geological features and rocky substrate rather than marine life.

Taughannock Point features an underwater delta where the outwash of Taughannock Creek extends nearly a quarter-mile into Cayuga Lake. Snorkellers can explore the shallow, rocky shelf surrounding this point, which reaches depths of 2 to 5 metres with an average of 3 metres. This site is suitable for beginners and offers shore access. Conditions include mild currents and visibility typically ranging from 2 to 3 metres. Water temperatures vary significantly by season, requiring appropriate thermal protection. Divers and snorkellers may encounter various temperate freshwater fish and invertebrates typical of the region. Be aware of boat traffic, cold water, and low visibility when planning your visit.

Fair Haven Beach in the United States offers a freshwater snorkeling experience along a long sandy shoreline. The site features a gradual drop-off with depths ranging from 1 to 5 metres, averaging 3 metres. Snorkellers often explore the area near the breakwater piers, where rocky crevices provide habitat for temperate freshwater fish and invertebrates. Conditions vary, with visibility reaching up to 25 metres on calm days. Water temperatures fluctuate significantly between 3C and 23C, making a wetsuit necessary. Hazards include boat traffic, rip currents, and surf. Facilities at the site include parking, toilets, and showers.