In the old days when visiting clients, you'd consult a paper map, make mental notes where to go, and you'll arrive safe and sound at your client/destination. This also have the advantage of you "optimizing" your route especially if you knew which shady parts of the city/country to avoid.
Nowadays you just plonk your destination into your GPS, and if you land up in the middle of a squatter camp late at night.... (Happened to me once).
I prefer the old way of doing it, by mentally plotting and remembering your route, gives them brain cells a good workout.