Las Vegas is the 29th-most populous city in the United States. It is one of the famous American West city to have been founded in the 20th century, it has been grew from a tiny, desert-bound railroad service centre at the outset of the 20th century to the country’s fastest-growing metropolis at century’s end,with a population of 2,027,828 approximately. It is Nevada’s economic centre and largest city. Las Vegas is a place of million-light bulb signs and fantastic architecture, of readily visible wealth. Grand Canyon or Yellow stone national park is one of the leading vacation destinations. Las Vegas’s historic core lies at a site once occupied by marshes, freshwater springs, and grassy meadows. The old downtown at the centre of the city running some 4 miles (6 km) to the southwest, where the city’s most ostentatious and luxurious hotels, restaurants, casinos, and restaurants were built. Today, the city is an international hub for finance, commerce, industry, technology, telecommunications, and transportation. The city encounters itself as “ The Entertainment Capital of the World”, and is famous for its mega casino–hotels and associated entertainment. This city is one of the top three leading destinations in the United States for conventions, business, and meetings. In addition, the city's metropolitan area has more AAA Five Diamond hotels than any other city in the world, and is a global leader in the hospitality industry. Today, Las Vegas is one of the top tourist destinations in the world. McCarran International Airport handles international and domestic flights into the Las Vegas Valley. It is the main commercial airport for the Las Vegas Valley and Clark country, Nevada, United States. It is about 5 miles (8.0 km) south of downtown Las Vegas.