A gloriously defiant work in progress, the US isn't a place that you come to and stand still. America has always been about the journey, and calls out for exploration and discovery. Some head to the cities, from the bright lights of Manhattan to Los Angeles' sun-drenched boulevards, while others choose solitary contemplation of the country's awesome natural beauty. Some come to revel in America's kitsch and pop culture. But if the journey across America never fails to be rewarding, it's because of the people, whose energy and restless reinvention never cease. With more than 115 years exploring the globe with its writers, photographers, and research expeditions, "National Geographic" is uniquely positioned to introduce your readers to everything they need to know about the countries of the world.