Kultakaleeri is a reef and seagrass site located in the Helsinki Region of Finland. Accessible only by boat, the site features depths ranging from 7 to 14 metres, with an average depth of 10 metres. Divers should expect mild currents and visibility typically between 5 and 10 metres. Due to the cold water environment, which reaches a maximum of 14 degrees Celsius in summer and maintains a 4-degree bottom temperature, a drysuit is recommended. The site is suitable for beginners, though divers must remain aware of cold water and low visibility hazards. Typical dive times are approximately 45 minutes.

Tallholmen is a reef dive located in the Helsinki region, accessible only by boat. The site features depths ranging from 10 to 15 metres with an average of 14 metres. Divers encounter mild currents and visibility typically around 5 metres, which can fluctuate based on local conditions. Given the water temperature range of 1 to 16 degrees Celsius, a drysuit is strongly recommended. The site is suitable for intermediate divers who are comfortable managing low visibility. Divers should remain aware of their surroundings due to the presence of sharks. A torch is advised for all dives, and it is essential to verify visibility conditions locally before departure.

Vessöö Sand Pit is an artificial reef site located in the Helsinki Region of Finland. This shore-entry dive is suitable for beginners, offering depths ranging from 3 to 14 metres with an average depth of 3 metres. Divers should be prepared for cold water conditions, as temperatures fluctuate between 1 and 15 degrees Celsius throughout the year. The site typically features mild currents, and a standard dive duration is approximately 30 minutes. Due to the cold water environment, appropriate thermal protection is essential for all divers visiting this location.

Soederskaer is a reef site located in the Helsinki Region of Finland, offering depths between 20 and 25 metres with an average of 22 metres. This site requires boat access and is suited for intermediate divers. Visibility is consistently around 5 metres, necessitating close-range observation. Water temperatures fluctuate significantly, ranging from 1C in winter to 16C in summer, and remain cold at depth throughout the year. Dry suits are compulsory for all dives. While currents are generally mild, strong currents are a potential hazard. Divers should exercise caution regarding sharp rocks and maintain buoyancy control to avoid contact with the seabed. The habitat supports typical Baltic and Gulf of Finland reef life.

Raimo Ragnar is a wreck and reef site located in the Helsinki Region of Finland. The site features an artificial reef structure suitable for intermediate divers, with depths ranging from 5 to 30 metres and an average depth of 15 metres. Divers can expect mild currents and visibility between 5 and 15 metres. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 15 degrees Celsius, necessitating the use of a drysuit. Entry is via the shore. Divers should remain alert for passing boat traffic when surfacing and manage potential entanglement risks when navigating the artificial structures. The habitat supports various temperate marine life typical of the region.

Sea Safety Scandinavia is a wreck and artificial reef site located in the Helsinki Region of Finland. Divers access the site by boat, which is situated approximately 6,482 metres from the shore. The site features depths between 19 and 21 metres, with an average depth of 20 metres. Conditions include mild currents and variable visibility ranging from 1 to 10 metres. Due to water temperatures between 1 and 12 degrees Celsius, drysuit use is required. The environment presents risks of entanglement, so divers should maintain attentive buoyancy while exploring the structures. The site is suited for intermediate divers, with typical dive times around 25 minutes.

The Hval Wreck is a cold-water wreck site located off the coast of Helsinki, Finland. Resting at depths between 20 and 31 metres, this site is suited for intermediate divers. Visibility is typically limited to 5 metres, requiring methodical navigation and the use of a torch to examine structural details. The water temperature remains low, ranging from 1 to 10 degrees Celsius, necessitating the use of a drysuit. Access to the site is by boat only. Divers should remain vigilant regarding boat traffic on the surface and deploy a delayed surface marker buoy for every ascent.

The Kronprins Gustaf Adolf is a shipwreck site situated in the Helsinki region, serving as an artificial reef. Divers can explore the wreck at depths ranging from 18 to 21 metres, with an average depth of 20 metres. Access to the site requires a boat, as it is located over 6 kilometres from the shore. Conditions at the site include moderate currents and visibility that fluctuates between 2 and 10 metres. Water temperatures are cold, ranging from 1 to 12 degrees Celsius throughout the year. Due to the environment, divers should be aware of boat traffic, cold water conditions, and low visibility.