Washington D.C. is the capital of USA and the center of the political life of the country. Its construction began in the 18th century and was planned and designed to become the permanent capital of the USA. The metropolitan area of Whashington has a population of some 5.3 million inhabitants, it is the eighth largest city in the country. The area more known by tourists is the National Mall, where most of the city’s museums, as well as some of the most emblematic monuments in American history, such as the Lincoln Memorial, the Memorial dedicated to the Veterans of the Viet Nam Guerra, or Whashington Monument, a tribute to George Washington. The museums include the National Air & Space Museum, the most visited among North American museums, the National Gallery of Art, with works by artists from the middle ages to the present day, and the National Museum of the American Indian, which tells the story and the culture of the natives of the Americas since its discovery until the contemporary era. Neither be forgotten historical buildings such as the Capitol Hill, seat of the Senate for more than 200 years, and of course the White House, to which George Washington wanted to convert in the residence of us Presidents, although ironically was the only President who never came to live there. This city is bursting with culture and the best is that the entrance to almost all museums and Government buildings is completely free. In addition, Washington is easy to visit, through modern means of public transport, metro, buses and light rail, both on foot, because the streets that cross from North to South are numbered and carry most of which cross from East to West by name the letters of the alphabet. Washington D.