Just a plain ordinary overhead map. So that players can look over on it. Or even something at the train station that shows where everything is. All this minus the secrets of course.
Then, whenever someone says “How do I find X” we can just point them to a map they can open to look at where they gotta go. then, they press M and discover how to get there all by themselves.
There might be a duplicate and it might just be in the works considering we’re getting fast travel, but I might as well get it out there in case it isn’t, and I tried my best to comb through the bazillion other suggestions with the word “map” in it.