Gilboa Quarry is a freshwater site in the United States featuring an artificial reef and a wide depth range of 5 to 43 metres. With an average depth of 14 metres, it accommodates both beginner and technical divers. The site offers shore entry and visibility ranging from 5 to 24 metres. Divers should be prepared for cold water, with bottom temperatures consistently near 4°C and seasonal surface variations. Thermoclines are present throughout the water column. Due to submerged structures and overhead environments, divers must maintain buoyancy control to avoid entanglement risks. Full facilities are available on-site, including air fills, equipment rental, and changing rooms.

Portage Quarry is a freshwater dive site in the United States offering calm, controlled conditions suitable for beginner divers. The site features depths ranging from 12 to 18 metres with visibility typically between 5 and 15 metres. Divers enter directly from the shore. Water temperatures vary significantly, with a thermocline present in late May and surface temperatures reaching 20 to 26 degrees Celsius during the summer. The site is equipped with on-site facilities including a dive shop, air fills, parking, showers, toilets, and changing rooms. Guided tours are available for those who prefer assistance, and the site is well-suited for training dives or refresher sessions.