Wild Lake, Idrija

Wild Lake is a lake near Idrija in western Slovenia and a karst spring of the Vauclusian type. The lake is the source of the Jezernica River, a tributary of the Idrijca and, at 55 metres long, the shortest river in Slovenia. Water flows from under the ground and through a steeply inclined tunnel, explored to a depth of 160 metres. The discharge occasionally surpasses 60 cubic metres per second. However, when the water level is low, there is no outflow from the lake. In 1967, the lake was protected as a natural monument. In 1972, it was arranged to be the first Slovenian natural museum. ()