I lived in Lincoln, Nebraska for five years and occasionally go back as my wife has family there. I would gladly move back there if circumstances warranted - it’s a very nice city indeed. Most of it feels like one big suburb.
I read the question as being about attraction as a tourist destination, so I nominated Chicago as being sui generis – though of course there are plenty of other great tourist destinations, e.g., San Antonio, New Orleans, and even Dearborn MI (for just one major attraction).
However, if it’s about places to live in, then the field is far more open, and includes places that tourists would hardly ever go to, like Columbus OH.