Bainbridge Quarry is a freshwater artificial reef site located in the United States near Lakes. The site features a sunken road that remains at a shallow depth of under 6 metres, making it suitable for beginner snorkellers. Depths across the quarry range from 6 to 36 metres, with an average depth of 6 metres. Visibility at the site typically varies between 6 and 15 metres. Shore entry is available for water access. On-site facilities include toilets, showers, a dive shop, and air fills for visiting divers and snorkellers.

Sinsheim Cove, located within Codorus State Park, serves as a designated area for underwater exploration. This freshwater site features submerged tree stumps and old foundations that create an artificial reef environment. Divers and snorkellers access the water from the shore. Conditions at the site include mild currents and visibility ranging from three metres upwards. Due to the presence of submerged structures, divers should be aware of potential entanglement risks and overhead environments. The site is suited for intermediate divers and offers a range of facilities including parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, a cafe, first aid, a dive shop, boat charter, guided tours, and gear storage.

Willow Springs Park is a freshwater site in the United States featuring artificial reefs and wrecks, including a 72-foot trawler named The Quest and a sunken VW Beetle. The site offers shore access with depths ranging from 10 to 55 metres, averaging 20 metres. Visibility typically spans 10 to 30 metres. Divers and snorkellers should be aware of potential entanglement hazards. Water temperatures are influenced by thermoclines, which vary throughout the year. The site is suitable for beginners and provides a 4/5 rating for snorkelling activities.

Willow Springs Quarry is a freshwater dive site offering a variety of underwater structures, including wrecks and artificial reefs. Divers access the site from the shore, with depths ranging from 3 to 17 metres. Conditions are characterised by mild currents and visibility between 3 and 9 metres. Divers should be prepared for significant thermoclines, as water temperatures drop considerably with depth; surface temperatures can reach 24°C, while temperatures at 12 metres may drop to 9.4°C. Hazards include cold water and low visibility. On-site facilities include a dive shop, equipment rental, air fills, showers, and a rinse station. Night diving is permitted at this location.

Guppy Gulch is a 15-acre freshwater reservoir and former slate quarry offering shore-entry diving and snorkelling. The site features various sunken objects, including trains and trucks, alongside floating docks and inflatable water parks. Depths range from 5 to 18 metres, with an average of 10 metres. Conditions include mild currents and visibility between 2 and 6 metres. Divers should be prepared for significant thermoclines and cold water at depth. The site is suitable for beginners and supports night diving, with typical dive durations of 45 minutes. The habitat supports temperate freshwater fish and invertebrates typical of the region.