In the US according to the Smithsonian Magazine
I have been to most of them, have you?
Great list for sure. I've been to 10 of them and was fortunate enough while growing up near Cleveland we had a summer house at Pt. Chautauqua on the lake for 10 years before my parents had enjoyed enough of winters and made us move to Southwest Florida.
Chautauqua is a splendid spot and glad to see it on top of the list.