The United States of America is the world's third largest population, living in densely-populated cities with sprawling suburbs, and vast, naturally beautiful areas. With its history of mass immigration dating from the 17th century, it is a "melting pot" of cultures from around the world. The East Coast includes the major cities (NY, Washington, Philadelphia, Boston) which are a magnet for tourists. The South features New Orleans, the laid back coast (Savannah, Charleston) and of course Florida. Central US is a vast and diverse space best known for its natural beauty, mountains, desert, and great plains. West Coast is famous for Hollywood in L.A., and the Bay Area