I know this might be considered cheating. But is there any specific types of buildings that are Fortresses?

Like where I live, churches are Inns. There’s a cemetery that’s a greenhouse. Someone told me H-E-B’s are Fortresses but the one near my home isn’t.

So Fortresses. Here in San Angelo I’m unable to find them and since I have no car it would be easier if I knew whether there specifically are buildings that are definitely going to be Fortresses (like specific grocery stores/types, or restaurants, or whatever).

Don’t get me wrong. It would be cool if I just knew the locations. Lol. But just a little help on what to look for or what locations I should go would be most appreciated.

Answered question