The United States (US) in the middle of North America consists of fifty states. Forty-eight of these are contiguous, the other two, Alaska and Hawaii, are separate. The US is one of the largest, richest and most powerful countries in the world. The country is an interesting mix of large urban areas and endless sparsely populated areas with beautiful nature. The history of centuries of immigration has created a unique mix of cultures from all over the world. A visit to the US is a study of contrasts.