I am biased, because I live here, but I also suggest Baltimore. When I lived in NJ I would visit frequently and since moving here I only love it more. There is so, so much more than the Inner Harbor. In fact, I wouldn’t suggest more than an afternoon at the Harbor. The aquarium is fantastic and the ships are cool to see but we also have incredible museums, Fort McHenry, Poe’s grave, the original Washington Monument, The Peabody Library, the first Roman Catholic Church in America (it’s just pretty, I’m not religious but they do still hold service if you are), beautiful parks, many historical buildings and amazing architecture, and really amazing food. I would be happy to give any suggestions.