Sufnersee-Gul is a shore-entry freshwater dive site located in the Ticino Rivers region of Switzerland. The site features a reef environment with depths ranging from 10 to 20 metres, with an average depth of 25 metres. Divers experience visibility between 5 and 15 metres in a low-current environment suitable for beginners. The site is equipped with on-site parking and toilets, facilitating a relaxed pace for shore entries. Water temperatures vary significantly by season, ranging from 15 to 20°C in summer to 4 to 8°C in winter. Divers should expect temperate freshwater fish and invertebrates typical of this habitat.

Sufnersee-Im Gufer is an artificial reef located within a Swiss alpine lake. This shore-accessible site features depths ranging from 25 to 51 metres, with an average depth of 25 metres. Visibility typically spans 5 to 15 metres. The site is diveable year-round, though water temperatures vary significantly, ranging from 4.0 to 8.0 °C in winter and 15.0 to 20.0 °C in summer. Divers should be prepared for cold water and the risks associated with deep diving, including nitrogen narcosis. Facilities at the site include parking, toilets, and showers. Typical dives last approximately 40 minutes.

Lai da Sontga Maria-Passhoehe is an alpine lake site in the Maggia Valley featuring an artificial reef structure. Divers access the water via a shore entry point with on-site parking available. The site offers visibility between 5 and 10 metres with no significant current. While the site is accessible to beginners, the depth ranges from 20 to 86 metres, necessitating strict adherence to decompression diving protocols. Divers must account for cold water temperatures and the risks of nitrogen narcosis. It is recommended to remain in the shallower sections of the reef unless training and experience levels are appropriate for deeper, technical diving.

Lai da Sontga Maria is a deep Alpine reservoir in the Maggia Valley, Switzerland, featuring an artificial reef structure. This site is strictly for advanced technical divers, with depths ranging from 30 to 86 metres. Divers encounter cold water conditions and must manage risks including nitrogen narcosis, decompression obligations, and potential entanglement in submerged infrastructure. Visibility typically ranges between 5 and 10 metres. Entry is via the shore near the dam wall, where parking is available for kit assembly. Due to the extreme depths and cold temperatures, careful gas management and appropriate thermal protection are essential for all dives at this location.

Pozzo del Diavolo is a freshwater river dive in the Maggia Valley, Switzerland. This shore-entry site features a reef structure reaching depths between 5 and 14 metres, with an average depth of 10 metres. Divers encounter moderate currents that require solid buoyancy control and awareness to avoid entanglement. Visibility is variable, ranging from 5 to 15 metres. Due to the cold water temperatures typical of mountain rivers, divers should monitor air consumption closely and carry a cutting tool. Conditions can shift rapidly, making it essential to check the current and visibility immediately before entering the water. This site is suited for intermediate divers.

Lai da Marmorera is a reservoir dive site featuring an artificial reef structure. The site offers a calm environment suitable for beginners, with depths ranging from 15 to 20 metres and an average depth of 18 metres. Divers can expect visibility between 10 and 20 metres, though conditions vary based on lake turnover. Shore entry is straightforward, and the site is equipped with parking and a cafe. Due to the high altitude, water temperatures remain consistently cool, and a drysuit is recommended for comfort. A typical dive lasts approximately 40 minutes.

Lago Cadano in the Maggia Valley is a meromictic freshwater lake featuring permanently stratified water layers. Divers can access the site directly from the shore. The topography includes a reef structure ranging from 11 to 21 metres in depth, with visibility typically between 5 and 10 metres. The lake contains a unique bacterial layer located within the chemocline between the oxygen-rich upper layer and the anoxic lower layer. Due to the presence of overhead environments and significant depths, appropriate training is required. Divers should prepare for cold water temperatures throughout the year. The habitat supports various temperate freshwater fish and invertebrates typical of the region.

Lai da Marmorera-Bushaltestelle is a freshwater alpine reservoir dive site featuring a combination of wreck and artificial reef structures. Divers can explore depths ranging from 10 to 65 metres, with an average depth of 20 metres. Visibility typically spans 5 to 20 metres. The site is suitable for intermediate divers who must manage cold water temperatures and potential entanglement risks associated with the structures. A dry suit or thick wetsuit with hood and gloves is essential year-round. The site is accessed via a shore entry, with parking and a cafe available nearby for post-dive facilities. The habitat supports various temperate freshwater fish and invertebrates.