Funny, I just realised where I had seen the icon before while reading your first sentence. Then later it was confirmed in the same paragraph.

Thinking back, I can only remember once instance of the sign and it happens to be just around the corner from where I grew up.

And just for kicks, if someone wants to see it in action: https://www.google.co.th/maps/place/Guml%C3%B6sa+Kyrka,+288+...