Honestly, I don't see any use in Panama Canal. I know this is quite important in real life, but in civilization specifically this is almost totally useless and depends on very specific circumstances to be useful. I don't think that in Humankind it would be any different.
Of the options that are not in the poll, I would like Louvre, Neuschwanstein and Brandenburg Gate.
I would like some non-European industrial wonders too, but I can't think of anything right now.