4 seems like it should point clearly at something, but at what I can't grasp. I'll state it's neither CANAAN, CANADA, nor the CATHOLIC CHURCH. (that last one for comedic effect, but hey!)
however, I have to disappear for about ten minutes in the name of Democracy (we have local elections where I am today and voting closes very shortly). I'll say what I think 1 is and then vanish briefly.
I will be very surprised if this is the right answer, but I wonder whether 1 might be the CAELOCANTH. Having written this I am stricken with the thought that it might be COELO rather than CAELO in which case it's even less likely to be right.