Hungary Croatia Curacao Puerto Rico New Orleans The East Coast of the US from MA to FL Denver Austin Vegas (eww) Toronto (barely) Paris
I know NYC and DC the best of all though having lived in both.
My partner and I love doing walking tours, seeing historic sites, architecture, unique cultural stuff, high and low art--- but we don't need to see the latest Monet touring blockbuster cuz that will always end up in our hometown anyway.
We love mass transit, bicycling and eating regional food. We like the outdoors but don't pitch tents and climb mountains.
That's the short of it.
NYC, New Orleans, Paris, DC, Budapest, Dalmatian Coast, San Juan, Buenos Aires