Leleskie Lake in the Masurian Lake District is a purpose-built dive site featuring an artificial reef and a submerged wreck. The site offers shore entry and depths ranging from 8 to 49 metres, with an average depth of 12 metres. Divers encounter mild currents and visibility between 2 and 8 metres. Significant temperature variations occur at depth, making full exposure protection advisable year-round. The site is suitable for intermediate divers, and night diving is permitted. On-site facilities include air fills, equipment rental, and guided tours, which are recommended for locating the underwater structures due to variable visibility.

Jezioro Świętajno in the Masurian Lake District is a freshwater lake offering shore-entry dives across a varied bottom. The site features natural reef formations, a wreck, and an artificial reef structure. Depths range from 3 to 11 metres, making it suitable for beginners. Visibility varies between 4 and 15 metres, and currents are generally mild. The site is accessible for night diving and supports multiple dives throughout the day. On-site facilities include parking, toilets, showers, changing rooms, air fills, and equipment rental. Divers should be aware of potential entanglement hazards and fluctuating visibility, particularly when navigating the wreck in low-light conditions.

Jezioro Swietajno is a freshwater lake in the Masurian Lake District featuring both natural and artificial reef structures. The site offers shore-based diving suitable for beginners, with depths ranging from 12 to 25 metres. Visibility typically measures 5 to 6 metres. Divers should remain vigilant regarding boat traffic, particularly near the harbour entrance, and are advised to use a surface marker buoy during ascents. Water temperatures in summer range from 18°C to 22°C, while spring and autumn temperatures can drop to 5-8°C. Night diving is available year-round. On-site facilities include air fills, guided tours, and a cafe.

Jezioro Pilakno is a freshwater site in the Masurian Lake District offering both shore and boat access. The topography features a sharp drop-off, with depths ranging from 9 metres down to 56 metres and an average depth of 13 metres. Visibility typically spans 5 to 10 metres. Due to a thermocline, water temperatures drop significantly below 5 to 6 metres, reaching 3°C to 4°C, while surface temperatures in summer hover between 18°C and 20°C. Divers should be prepared for cold water conditions year-round, making drysuits or thick wetsuits advisable. The site supports night diving and provides on-site facilities including air fills, a dive shop, gear storage, a café, showers, and toilets.

Jezioro Wulpińskie is a freshwater lake in the Masurian Lake District offering depths between 3 and 13 metres. The site features a mild current and is suited for intermediate divers looking to practice buoyancy and navigation in varying visibility conditions. Shore entry is available, with parking provided at the site to assist with gear transport. Divers should remain vigilant regarding boat traffic, as it is an active hazard in the area. The use of a surface marker buoy is essential throughout the dive to ensure safety. Conditions can shift, so planning dives for early morning when boat traffic is lightest is recommended.

Jezioro Lampackie is a calm freshwater lake located in the Masurian Lake District of Poland. The site offers a shallow environment with a maximum depth of 11 metres, and the primary diving zone is situated between 5 and 11 metres. Visibility is typically around 5 metres. The site is suitable for beginners and can be accessed via shore or boat. Divers should maintain strict buoyancy control to avoid contact with the lake bed. As this is a freshwater environment, expect a typical inland ecosystem. Sturdy water shoes are recommended for shore entries to navigate the terrain comfortably.

Za Piratem in the Masurian Lake District offers a freshwater dive experience suitable for beginners. The site features a wreck and a cave structure, providing clear navigation points within a maximum depth of 12 metres. Divers enter from the shore into mild currents. Water temperatures vary significantly, ranging from 5°C to 8°C in colder periods and reaching 18°C to 22°C during summer. Due to the cold water, a drysuit or thick wetsuit is recommended. The cave section is an overhead environment; divers should remain within the light zone unless properly trained for penetration. Facilities including parking, toilets, showers, and changing rooms are available on site.

Jezioro Tyrsko is a shallow freshwater lake in the Masurian Lake District of Poland, reaching a maximum depth of 8 metres. This site is suitable for beginners and those looking to practice buoyancy and navigation in a forgiving environment. Divers enter from the shore to explore the lake, which features reef-like structures. Conditions include mild currents and variable visibility. Due to the nature of the lake, cold water is a constant hazard, and appropriate thermal protection such as a drysuit or well-fitted wetsuit is essential year-round. Divers should arrive self-sufficient with all necessary equipment, including surface marker buoys, as facilities are not guaranteed on site.