https://en.almenland.at/experience-movement/ausflugsziele/natur/hoehlen-klammen/raabklamm/
Almenland Raab Gorge / Source of the Raab / Styria
The Raabklamm, with the Raab River originating at the foot of the Osser, is Austria’s longest continuous gorge at 17 km and a Natura 2000 protected area:
source ofthe styriaraabgorge