There are two paths in Tenerife that run from the cemetery near Igueste de San Andres, to the old Semaforo up on the mountain. The new path is signposted, well-constructed, and takes a long route to get there.
There’s also an old path, probably used by the workers when the Semaforo was operating. It’s a rough path which is hard to find at the beginning but apart from that is well-defined. It is exposed in places, and the handrail is missing in one of the exposed places. The old path takes the short route to get there and is quite spectacular. But it requires great care and is only for adventurous hikers.
I discovered the old path when I saw it on OSM. But recently I noticed that the old path had been deleted, with the comment “Deleted a dangerous path”.
This leaves me conflicted. Philosophically I believe that if something exists on the ground, it should be mapped. But of course I would not wish for anyone to see the map and expect to find a well-maintained path there. The SAC scale is tagged as “Demanding mountain hiking” which seems reasonable to me, but the SAC scale is not reflected in the rendering on openstreetmap.org.
Anyway, I have un-deleted the way (158925363).
I should mention also that there are hundreds of adventurous paths on Tenerife that would need to be deleted if “dangerous” paths should not be on the map.