Zandeiland 4 is a freshwater dive site located in the Vinkeveense Plassen. The site features an artificial reef and a wreck, both resting at a depth of 5 metres. It is suitable for beginner divers looking to build confidence in a controlled environment. Conditions include mild currents and visibility ranging from 3 to 12 metres. Water temperatures fluctuate between 7 and 20 degrees Celsius throughout the year, requiring appropriate thermal protection. Facilities available at the site include parking, toilets, showers, changing rooms, and air fills. Night diving is permitted at this location.

The REM III is a wreck dive located in Grevelingen, Netherlands, resting at depths reaching 24 metres. This site requires a boat entry and is situated 40 metres from the shore. Divers should be prepared for moderate currents and low visibility, which typically ranges between 1 and 5 metres. Due to these conditions, a torch, compass, and surface marker buoy are essential equipment. The site is suitable for intermediate divers who are comfortable navigating a wreck structure in limited visibility. Water temperatures fluctuate between 7 and 19 degrees Celsius throughout the year. Facilities including air fills, showers, and a dive shop are available nearby.

Oosterduinse meer is a landlocked freshwater lake in the Grevelingen area of the Netherlands, featuring an artificial reef structure. This site is suitable for beginners, offering depths ranging from surface level to 13 metres. Divers can expect visibility between 3 and 10 metres, with conditions generally calm and predictable. The water temperature fluctuates between 7C and 20C throughout the year. The habitat supports various temperate freshwater fish and invertebrates typical of the region. Shore access is available, and parking is provided on site. Divers should remain alert for surge and swell when entering or exiting, and maintain a safe distance from walls to avoid impact from water movement.

Wijkertunnel is an artificial reef site located in the Vinkeveense Plassen. Divers access the site from the shore, swimming approximately 90 metres to reach the structure. The site features depths ranging from 4 to 9 metres, with an average depth of 7 metres. Conditions are challenging, characterised by low visibility of 2 to 4 metres, mild currents, and potential boat traffic. Due to these factors, the site is suitable for advanced divers who possess strong buoyancy control and navigation skills. Water temperatures fluctuate between 6 and 20 degrees Celsius, requiring appropriate thermal protection throughout the year. Divers should use a surface marker buoy and exercise caution regarding entanglement risks on the reef structures.

Noordzeekanaal Kruithaven is a freshwater site in the Vinkeveense Plassen offering both wreck and artificial reef diving. The site features depths ranging from 5 to 50 metres, with an average depth of 15 metres. Divers should be aware of a thermocline located at approximately 9 metres. Conditions include mild currents and visibility typically between 4 and 10 metres. The site is accessible via both shore and boat, and night diving is permitted. Facilities available at the location include parking, toilets, showers, changing rooms, air fills, and a dive shop. Due to the depth and potential for boat traffic, this site is suited for intermediate divers.

Molenplas in Grevelingen offers a reef structure ranging from 6 to 18 metres in depth. The site is accessible via both shore and boat entries, making it suitable for various training needs. Divers encounter mild currents and visibility typically between 5 and 10 metres. Water temperatures fluctuate significantly throughout the year, ranging from 7 to 20 degrees Celsius, necessitating appropriate thermal protection such as a drysuit or thick wetsuit with hood and gloves during colder months. The habitat supports a variety of temperate marine life and invertebrates typical of the region. Always remain aware of boat traffic near the shore entry point and verify current conditions before entering the water.

Haarlemmermeerse Bos is an artificial reef located in the Grevelingen, Netherlands. Divers access the site from the shore, with the main area situated approximately 50 metres out. The site features depths ranging from 5 to 20 metres, with an average depth of 15 metres. Conditions vary, with visibility typically between 1 and 10 metres. An air circulation system operates from May 1st to October 1st to manage water temperature and cyanobacteria levels. Divers should be aware of potential hazards including boat traffic, entanglement risks, strong currents, and low visibility. Facilities at the site include parking and a cafe. Night diving is permitted.

Toolenburgse Plas is a freshwater dive site in the Netherlands featuring a variety of underwater structures, including wrecks, cars, training platforms, and an old cannon. Divers can access the site from the shore, with the main features located approximately 50 metres out. The site is suitable for beginners, with depths ranging from 3 to 25 metres and an average depth of 7 metres. Visibility typically fluctuates between 2 and 5 metres. The site offers facilities including parking, toilets, showers, a rinse station, a cafe, and a dive shop. Night diving is permitted, and the habitat supports various temperate freshwater fish and invertebrates.