Visit E.U. America is a great nation with nearly ten million square kilometers and its natural wealth is vast. The country has 58 natural and due to the vast territory it occupies provides totally different landscapes parks. Some remarkable natural sites are: - The Niagara Falls are located between the United States and Canada. It consists of three waterfalls, one of which belongs to Ontario (Canada) and other New York (USA). - The Grand Canyon is a beautiful natural gorge opened by the Colorado River in Arizona.

The United States officially the United States is a sovereign country constituted a constitutional federal republic comprising 50 states and a federal district. Most of the country is located in central North America, where its 48 contiguous states and Washington DC, the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to south. The state of Alaska is in the northwest of the continent, with Canada to the east and west separated from Russia by the Bering Strait. The state of Hawaii is an archipelago in the Pacific Ocean, and is the only US state that is not in America. The country also possesses several territories in the Caribbean and the Pacific.

With 9.83 million square kilometers and with over 316 million inhabitants, the country is the fourth largest in total area, the fifth largest in contiguous area and third in population. It is one of the nation's most ethnically diverse and multicultural world, due to the large escala.11 immigration is, on the other hand, in nominal terms the world's largest national economy, with a GDP estimated at 15.7 billion dollars (a quarter of nominal global GDP) and one fifth of global GDP power parity GDP adquisitivo.9 In PPA was overtaken by China in 2014.12 The European Union has a bigger economy, but not a single nation.

Indigenous peoples have inhabited what is now the continental United States by thousands of years. This Amerindian population was reduced by disease and warfare after the first contact with Europeans. United States was founded by thirteen British colonies located along the Atlantic coast. On July 4, 1776, they issued the Declaration of Independence, which proclaimed their right to self-determination and the establishment of a cooperative union. The rebellious states defeated the British Empire in the War of Independence, the first colonial war of independence exitosa.13 The current United States Constitution was adopted on September 17, 1787; its ratification the following year made the states part of a single republic with a strong central government. The Bill of Rights, comprising ten constitutional amendments guaranteeing many fundamental civil rights and freedoms, was ratified in 1791.

In the nineteenth century, the United States acquired territories of France, Spain, United Kingdom, Mexico and Russia, and annexed the Republic of Texas and the Republic of Hawaii. In the 1860s, disputes between the agrarian South and industrial North over states' rights and the abolition of slavery led to the Civil War. The North's victory prevented a permanent split of the country and led to the end of legal slavery. For the 1870s, the national economy was the world14 the largest and the Spanish-American War and World War I confirmed the country's status as a military power. After World War II, it emerged as the first country with nuclear weapons and a permanent member of the United Nations Security Council. The end of the Cold War and the dissolution of the Soviet Union left the United States as the sole superpower. The country accounts for two-fifths of global military spending and is an economic, political and cultural leader in the world.