Felsentäli is a fascinating place, you're just in the city and you're in Felsentäli either from Hauentalstrasse or from below Lochstrasse. The small gorge was carved out by the Hemmetaler …
The small waterfall with a picturesque ravine and rocks is right next to the wide wooden path. If you want to wade through the creek a little, you can also watch the fall in the ditch itself.