kuhni74
in the lower part, there is a 15 m high ladder - I'd vote for "demanding_mountain_hiking" and "via_ferrata_scale=1" or even "2" according to https://www.bergsteigen.com/touren/klettersteig/rudolf-decker-steig-in-der-steinwandklamm/ (scale "B" = "2") and https://wiki.openstreetmap.org/wiki/Key:via_ferrata_scale