This dive site is Lake Cadagno, a natural reservoir in the Piora region of Switzerland renowned for its unique limnological features. It exhibits permanent stratification, meaning two chemically distinct water layers remain separated throughout the year by a small transition zone. This meromictic lake is a site of significant scientific interest, part of the Centro di Biologia di Alpi, offering divers a chance to explore a truly one-of-a-kind underwater environment. Navigation primarily involves exploring the shallower, oxygenated upper layer and carefully observing the intriguing boundary of the chemocline.
The unique ecosystem of Lago di Cadagno supports specialized microbial communities and extremophile microorganisms, particularly within and below the transition zone where conditions are anoxic. While large marine animals are absent, the lake hosts typical cold-water freshwater fish such as trout or char in its upper layers, along with various aquatic invertebrates. The primary allure for divers interested in marine life here is the microscopic and specialized life adapted to the lake's distinct chemical environments.
For divers, the best time to visit is during the warmer months, typically summer and early autumn, although the water will always be cold, necessitating dry suit diving. This site is particularly recommended for divers and freedivers with an interest in limnology, unique ecosystems, and scientific exploration rather than typical coral reef beauty. Prepare for cold water conditions and enjoy the unparalleled experience of exploring a living laboratory.
