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Join Modern Marvels as we discover how truck stops, serving more than twenty million truckers nationwide, are bigger and better than ever. These mammoth pit-stops are essential cogs in the machinery that keeps goods flowing seamlessly around the country. In this episode we'll tour the world's largest truck stop, a grand service area complete with fuel, food, parking, private showers, a movie theater, a dentist office, and a barbershop . We'll see how 18-wheelers power elaborate living quarters without idling their engines by plugging into truck stop utilities.