Niesen in Lake Thun offers diverse freshwater diving across reef, wall, and muck environments. The site extends from 7 to 46 metres, with deeper sections requiring decompression procedures. Divers should expect mild currents and visibility ranging between 6 and 10 metres. Due to the significant depth and cold water temperatures, which fluctuate between 4 and 24 degrees Celsius depending on the season, this site is suited for intermediate divers with appropriate thermal protection. Shore access is available with parking located at the entry point. Divers should maintain strict awareness of their dive profile and depth throughout the typical 35-minute dive.

Ameisenecke in Lake Thun features a distinctive wall and reef topography that drops rapidly from the shore. Divers can navigate a horseshoe-shaped route at depths between 22 and 25 metres, with the site reaching a maximum depth of 25 metres. This alpine freshwater location offers visibility ranging from 5 to 15 metres and mild currents. Due to the cold water temperatures, which fluctuate between 10°C in winter and 18°C in summer, proper thermal protection and buoyancy control are essential. The site is accessible from the shore, with limited parking available nearby. Species recorded around this area include snail, common perch, burbot, barbel, pike, chub, bullhead, and American crayfish.

Matterhorn is a freshwater reef dive located in Lake Thun, Switzerland. The site features a reef structure extending from the surface to a maximum depth of 30 metres. Divers can expect visibility between 5 and 15 metres. Due to moderate currents, this site is suitable for divers with at least an Open Water certification. Cold water is a significant hazard, requiring the use of a drysuit or a thick thermal exposure suit. Facilities on site include a dive shop, air fills, equipment rental, and guided tours. Species recorded around this area include snail, common perch, burbot, barbel, chub, pike, American crayfish, and bullhead.

Bäregg in Lake Thun offers a distinct freshwater diving experience characterised by underwater rock formations and small vertical walls. The site reaches depths between 20 and 30 metres, with an average depth of 25 metres. Divers enter from the shore for a typical 50-minute dive. Visibility at this site ranges from 5 to 10 metres. Species recorded around this area include snails, common perch, burbot, American crayfish, barbel, bullhead, chub, and pike. Due to the presence of boat traffic, cold water, and variable visibility, this site is best suited for intermediate divers. Parking and toilets are available at the location.

Gunten Bad in Lake Thun offers a distinct freshwater diving experience defined by dramatic underwater rock walls and canyons. Divers can expect depths ranging from 15 to 50 metres, with an average depth of 30 metres. The site is accessed via a shore entry and is suitable for intermediate divers. Conditions include mild currents and visibility typically between 5 and 15 metres. Water temperatures are cold, dropping to 4°C during winter months. The site supports night diving and features facilities including parking, toilets, and air fills. Divers should remain aware of the significant depth and potential for entanglement hazards during their 50-minute dives.

Stampach Ralligen in Lake Thun is an advanced dive site characterised by a steep underwater wall, reef structures, and a canyon. Divers can explore submerged trees located approximately 100 metres from the shore. The site reaches depths of 20 to 30 metres, with an average depth of 25 metres. Conditions include moderate currents and visibility ranging from 6 to 10 metres. A thermocline is present, with temperatures at 20 metres and deeper remaining constant at 5 to 6 degrees Celsius. Due to the depth, cold water, and potential for entanglement, this site is suited for experienced divers. Parking is available for site access.

Ruedi-Walter-Platz in Lake Thun offers a combination of reef and wall topography suitable for intermediate divers. The site features a wall that descends from 20 to 40 metres, providing a deep-water experience in a freshwater alpine environment. Visibility at the site typically ranges between 5 and 15 metres. Entry is via the shore, and there is no current to manage during the dive. Divers should arrive self-sufficient with a full kit as facilities are not guaranteed on site. Species recorded around this area include snail, common perch, barbel, American crayfish, burbot, pike, chub, and bullhead.

Kanzel is a freshwater reef dive located in Lake Thun, Bernese Oberland. This shore-entry site features a reef structure that descends into deeper water, with the primary diving range situated between 20 and 40 metres. Conditions are generally calm with no significant current, providing a stable environment for buoyancy practice. Visibility is typically around 5 metres, which is characteristic of this alpine lake. Due to these visibility levels, a dive torch is recommended to assist in observing the reef structure and detail during your dive. Divers should remain mindful of their depth and stay within the limits of their personal training while exploring the reef.