The United States of America (USA), commonly known as the United States (U.S. or US) or America, is a country consisting of 50 states, a federal district, five major self-governing territories, and various possessions. At 3.8 million square miles (9.8 million km2), it is the world's third- or fourth-largest country by total area. Most of the country is located in central North America between Canada and Mexico. With an estimated population of over 328 million, the U.S. is the third most populous country in the world (after China and India). The capital is Washington, D.C., and the most populous city is New York City.
A highly developed country, the United States is the world’s largest economy by nominal GDP, the second-largest by purchasing power parity, and accounts for approximately a quarter of global GDP. The United States is the world’s largest importer and the second-largest exporter of goods, by value. Although its population is 4% of the world total, it holds 29.4% of the total wealth in the world, the largest share of global wealth concentrated in a single country. Despite income and wealth disparities, the United States continues to rank very high in measures of socioeconomic performance, including average wage, median income, median wealth, human development, per capita GDP, and worker productivity. It is the foremost military power in the world, making up more than a third of global military spending, and is a leading political, cultural, and scientific force internationally.
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The USA, or America, in general, needs no introduction. It is by far the most famous country in the world. But what makes America so famous? Attractions such as the Grand Canyon and Mount Rushmore naturally come to mind, as are its lasting imprints on global culture, such as Hollywood, music, sports, historical personalities, tech innovation, and more. The best way to experience America is to travel the all-American way — road-tripping! Cruise down the Pacific Coast Highway with your windows rolled down or ride with your gang through the heart of America on Route 66. America has something for everyone, natural wonders, man-made marvels, national parks, theme parks, beaches, mountains, cities, and charming small towns. It is a melting pot of cultures, cuisines, people and even geographies. From buzzing New York to chilled-out California, from frigid Alaska to tropical Hawaii, come along with us as we show you the things America is famous for.
About 82% of Americans live in urban areas (including suburbs); about half of those reside in cities with populations over 50,000. In 2008, 273 incorporated municipalities had populations over 100,000, nine cities had more than one million residents, and four global cities had over two million (New York, Los Angeles, Chicago, and Houston).