[marssaxman]

For full flavor, you'd have to include references to landmarks which no longer exist: "if you pass the vacant lot where the old drugstore used to be, turn around, because you've gone too far."

[kqr]

And weird, highly local code names like "Take the chicken leg and then turn left".

[iggldiggl]

A bit like https://xkcd.com/461/, you mean?