I mean the other 2 countries, Canada and Mexico, how similar are both of them to United States?? Both countries have a similar economy and democracy etc, and I think those two countries share things like supermarkets, stores, etc. I suppose the cultural differences are not a lot, that is very nice.
This guy is visiting many places all over the US, month after month, spending his time (often for days) talking to the natives and really digs into that diversity.
https://www.youtube.com/@PeterSantenello/videos