The lake has been protected as a natural monument since 1967. The water enters into the lake through a karst tunnel, which has been so far explored to the depth of 160 metres. The lake is surrounded by vertical rockwalls. The water is emerald green and very still, until it starts erupting water during the rainy period. It is home to many flora and fauna species. It is located about 2 km away from Idrija.
Photo: Klemen Urbančnik