You Can't Trust GPS

Nor can they present the combination of details and big picture that you get with a good roadmap. You might not realize how thin, winding, and long that road is if all you can see is the small section visible onscreen.

So use your GPS, but if you're going into unfamiliar territory, get an old-fashioned road map as well. And if that territory is potentially dangerous (they didn't name it Death Valley for nothing), get some advise from rangers or other local professionals.

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