I've been down these beautiful cascades several times over the waterway (canyoning), always an experience. The entrance to the upper waterfall is a bit difficult to reach through a thicket. …
I recommend the tour upwards, around the Ossiacher Tauernsee and the same route back. The direction of view changes on the descent, so go both directions (or what experienced hikers …
After Himmelberg the Tiebel is forced through the Poitschacher ditch. It is noticeable how the cool water humidifies and cools the area. On summer mornings, haze covers the stream.