Quellen Buchweißbach (Buchweißbach spring) near Saalfelden (Austria).

This is the karst resurgence of a pretty large underground river. It flows out of the mountain and forms a beautiful fan-shape waterfall.

The hike to this springs takes a few hours in a remote and rugged valley, on a trail equipped with ladders and cables. The last part of the hike requires wading across the stream. See other photos of this hike.