Korven Louhos is a flooded quarry in Finland that serves as an artificial reef. Divers access the site from the shore, with depths ranging from 5 to 19 metres. The site features mild currents and a consistent visibility of 7 metres, making it suitable for beginner divers. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 18 degrees Celsius, necessitating appropriate thermal protection such as a drysuit or thick wetsuit. Guided tours are available to assist with navigating the quarry layout. The site is also open for night diving, which offers a distinct perspective of the artificial structures.

Helsinginranta is a shore-entry reef dive located in the Baltic waters off Finland. The site features a reef structure that descends to depths between 15 and 30 metres, with an average depth of 23 metres. Divers encounter mild currents and visibility typically ranging from 5 to 10 metres. Due to the significant depth and cold water temperatures, which fluctuate between 1C and 18C throughout the year, proper exposure protection and careful gas management are essential. The site is suitable for beginners, though divers must remain aware of boat traffic and maintain neutral buoyancy to avoid contact with the reef structure.

Järppilän louhos is a shore-entry quarry dive site located in Finland. Reaching depths of up to 15 metres, this site features mild currents and is suitable for beginners looking to gain experience in cold-water environments. Water temperatures range from 1C in February to 18C in August, necessitating appropriate thermal protection such as a drysuit for most of the year. Visibility is highly variable, so checking recent local reports is recommended before planning a dive. Divers should exercise caution regarding buoyancy control and be aware of the potential for changing conditions within this enclosed freshwater environment.

Hilloisten Louhos is a freshwater quarry in Finland offering shore-based diving. The site features depths ranging from 5 to 19 metres, with an average depth of 12 metres. Divers can expect visibility between 20 and 30 metres. Water temperatures fluctuate significantly throughout the year, peaking at 18°C in August and dropping to 1°C in February. The site is suitable for beginners and supports night diving, with typical dive times around 50 minutes. On-site facilities include parking, toilets, showers, changing rooms, a rinse station, air fills, and guided tours. Due to the nature of the environment, divers should be prepared for cold water and deep conditions.