Public property is a good option. In theory, private owners can set rules against certain types of behaviors. Including evangelism. But in the US, property owned by the government generally must allow citizens to exercise all ten of the Bill Of Rights (rather than just the two and a half that the ACLU likes).
For example, you can go to a post office and, in the main, you should be able to preach there. Now, bear in mind that your "reach" will be limited to whoever's passing by at that moment. Plus, a lot of areas are still locked down so limitations may exist in those cases as well. Still, it's a good option since nobody can chase you off without breaking the law, for the most part.
I went to my local DMV a few years ago for some stuff and some guy was out there talking about what sounded like white national stuff. Some jewish broad who was also there demanded that the police on-site arrest that guy. And she didn't like their answer very much. Free speech, get it?
Not long after that weirdness, I went back to that same DMV for something else and some guy was standing outside doing open-air preaching. I asked the cops on-site about that and, again, they said it was legal to do that. Mostly, the police can't even tell the preacher to keep it down, the officer said.
So government-owned places are good options for this sort of thing for Americans.
