Minor Wonders

I have noticed that in some places there are stone circles indecating that there is a wonder in the region, but upon checking the settlement, there is no wonder listed. Are these future wonders, missing wonders, or errors?

I suspect that the resource used to represent the wonder exists in additional, unintended provinces, since I think the amount of wonder buildings is limited, right? How are the wonders set up? Like how the governments work, to some degree? A bunch of different kinds all crammed into one major branch?

yeah i noticed that in syacuse, theres actually two wonders on the map but no wonders visable in the city browser

There is one planned for syracuse later. It just got added to the strat map now.

There are also some extra in Phasania, Hayasdan, and elsewhere I think.