From Vienna: Tram 60 to the end (Rodaun), then 1.5km walk: Go west to Kaltenleutgebner Straße, then at the border between Vienna and Perchtoldsdorf, take Waldmühlgasse and go up in the forest on a trail for about 50m. About 3-4km from Liesing train station (S-bahn), very easy to cycle to, about 10km from Wien Miedling, just north of Perchtoldsdorfer Heide.
It’s a small but interesting cliff, with very easy access from Vienna. Very good for lessons as it is not very high, and there are lots of easy routes. Possibility of walking to the top. Very well secured.