Grossenzersdorfer Arm is a shallow freshwater arm of the Danube system, providing an accessible environment for beginner snorkellers. Entry is made directly from the shore into a mild current. The site features a reef structure in depths ranging from 2 to 6 metres. Visibility typically spans 5 to 10 metres, though it can fluctuate between 3 and 7 metres depending on conditions. Snorkellers should remain vigilant regarding boat traffic and stay clear of designated transit lanes. Due to potential entanglement risks and sharp rocks, caution is advised throughout the session. Species recorded around this area include snails, common carp, sun perch, rudd, pike, and common perch.

Tauchplatz Alte Donau is a sheltered oxbow lake in the Vienna Area, offering a calm, freshwater environment suitable for beginner divers. The site features an artificial reef structure, providing a focal point for navigation within the 3 to 7-metre depth range. Divers can expect visibility between 4 and 5 metres, though this may fluctuate following heavy rainfall. Shore access is available, and facilities include parking, toilets, showers, and changing rooms. Due to active boat traffic on the Alte Donau, divers must remain within the marked dive area and use a delayed surface marker buoy during all ascents.

Birthday is a shallow artificial reef located in the Vienna Area of Austria. This site features depths between 3 and 5 metres and offers visibility ranging from 5 to 10 metres. The calm, current-free environment makes it suitable for beginners to practice buoyancy and navigation around artificial structures. Shore entry is straightforward, though divers should remain vigilant for entanglement risks from submerged debris and sharp edges on the reef materials. Active boat traffic is present in the area, requiring constant awareness. On-site facilities include a dive shop providing air fills and guided tours, which are recommended for first-time visitors to familiarise themselves with the site layout.

Dive Company is an artificial reef site located in the Vienna Area of Austria. Divers can explore depths ranging from 5 to 23 metres, with visibility typically varying between 4 and 20 metres. Entry is via the shore. Facilities available at the site include parking, toilets, showers, a dive shop, air fills, and equipment rental. Due to the nature of the environment, low visibility is a potential hazard. Species recorded around this area include freshwater jellyfish, snails, common carp, common perch, sun perch, and rudd.

Laimergrube is a freshwater quarry site located near Korneuburg, offering calm and current-free conditions suitable for beginner divers. The site features various artificial reef structures placed on the bottom, which provide points of interest throughout the dive. Depths range from 5 to 20 metres, allowing for flexible training and exploration. Divers enter from the shore, making logistics straightforward. Visibility is variable, typically ranging between 5 and 15 metres. Due to the presence of artificial structures, divers should remain vigilant regarding the risk of entanglement. Freshwater temperatures can be cold below the thermocline, so appropriate thermal protection is recommended.

RedDoc is a freshwater shore-entry dive site located in the Vienna area. Divers can explore a reef structure at depths ranging from 3 to 16 metres, with an average depth of 8 metres. Conditions are generally manageable with mild currents and visibility between 3 and 10 metres. Due to cold water temperatures that can drop to 2C, dry suits or thick wetsuits are necessary. Divers should exercise caution regarding entanglement hazards and sharp rock formations. Air fills and guided tours are available to assist with navigation and site orientation. The site is suitable for beginners, though sturdy footwear is recommended for the shore entry and exit.

Gemeindeteich Wiener Neudorf is a freshwater dive site in the Vienna Area of Austria, offering depths between 12 and 19 metres. Divers access the water via a shore entry. The site features a thermocline, with surface temperatures recorded at 8.3°C and 7.5°C at a depth of 2.5 metres. Visibility varies from 5 to 15 metres, often performing best early in the day before surface activity. The environment is suitable for intermediate divers, though caution is required regarding depth, buoyancy, and potential entanglement. On-site facilities include parking, toilets, and a cafe, allowing for multiple dives throughout the day. The habitat supports various temperate freshwater fish and invertebrates typical of the region.

Erikateich is a freshwater dive site in the Vienna Area featuring an artificial reef structure. It serves as a practical training ground for beginners, with depths ranging from 2 to 12 metres and no current. Visibility is generally 5 metres. The lake functions as an industrial cooling pond, resulting in stable, pleasant water temperatures that can reach 24°C in summer. Shore entry is straightforward, and the site is equipped with parking, toilets, showers, changing rooms, and a cafe. Divers can expect to encounter typical temperate freshwater fish and invertebrates within the habitat.