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There is a qr hidden in the one image of this post (in fact two, but only one works), scan that, and it opens a site giving you the clue for the first one. But I am not sure ,where the others are going to come.

QR plaques hide in Graz’s shadowy corners and fleeting Snap posts drip digital breadcrumbs to the sharp-eyed.

Does not much help :)

I have the riddle, and cant for the life of me work it out I think I have some of it but notall

So the first qr code opens a link, that gives the keyword to search in worldmapin site, and opens the number pad, but did you get the other qr codes ? I still could not figure out how to get the other ones.

Yes it’s not supposed to be easy, there are more hints now at the bottom of the post. Good luck!