Most cities west of the Mississippi river and really anything that's had a growth spurt since about the 1970s/80s. Half of the South there are cities with "historic downtown [this place]" signs all over an area that is slowly deteriorating and basically unused compared to the new main drag that is a freeway with the big box stores and fast food on the side.
Philadelphia was laid out before sprawl and when both parties worked at building stuff instead of being dedicated to tearing down government or being a big tent where everyone can argue with each other.