Hańcza Lake is a deep freshwater site in Poland, reaching depths of 108 metres. The topography features a dramatic drop-off that begins at approximately 12 metres, transitioning into a steep, deep-water environment. Visibility varies between 3 and 12 metres. Due to the significant depth, cold water temperatures, and potential for overhead environments, this site is strictly for advanced and technical divers. Drysuits and appropriate thermal protection are essential. Strong currents can occur, requiring careful coordination during boat entries and exits. Guided tours are available through the local dive shop and are recommended for first-time visitors to navigate the complex deeper sections.

Teren Prywatny, also known as Maryjka, is a freshwater dive site located in Hańcza Lake. Divers typically experience an average depth of 12 metres, with recorded depths reaching approximately 12.3 metres. Access to the water is via a shore entry. Visibility at this site varies between 3 and 8 metres. A typical dive duration is around 40 minutes. Due to the nature of the environment, divers should be prepared for cold water and potential entanglement hazards. This site is suitable for beginner divers.

Busznica is a freshwater dive site located in Hańcza Lake, Poland. The topography features a reef structure that provides navigation interest for divers. Depths at this site range from 20 to 48 metres, requiring appropriate certification levels for deeper exploration. Visibility typically fluctuates between 5 and 10 metres. While the site is accessible year-round, water temperatures are low, particularly outside of the summer months, making drysuits or thick wetsuits advisable. Divers should be prepared to be self-sufficient as on-site facilities are not confirmed. The site is suitable for beginners in shallower sections, though deeper areas require advanced training.