The article doesn't say that it means camping ground. It says it means > a floral symbol that was used in Sweden to indicate an interesting feature or attracti

The article doesn't say that it means camping ground. It says it means > a floral symbol that was used in Sweden to indicate an interesting feature or attraction in a campground which is something entirely different. (It might still be wrong -- from what you say it sounds as if it's used in plenty of places other than campgrounds -- but it isn't wrong in the way you imply it is.)