Pießling-Ursprung (TILOS / no diving)
Diving is prohibited. The Pießling-Ursprung south of Roßleithen near Windischgarsten is one of the largest karst springs in the Eastern Alps and a protected natural monument. Water wells up with great force from a spring pool about 32 m deep – around 2,000 litres per second in summer and 7,000 or more during snowmelt. Behind the pool are air-filled passages ending in another sump, explored to about 120 m length and 40 m depth; the first dives took place in 1962. After a 1987 accident in which a diver and a gendarme sent to rescue her died, diving in the spring pool was banned.
depth: 0–40 m