Added route relation here
https://www.openstreetmap.org/relation/17579858
It will not be shown on any application (unordered, no way -road- members).

It is similar to a (qr-code) fitness trail (or signed fitness meetup point)
https://wiki.openstreetmap.org/wiki/Tag:route%3Dfitness_trail

See also "Kabouterpad" ('gnome trail', or 'fairy trail');
https://www.staatsbosbeheer.nl/uit-in-de-natuur/kabouterpad