The United States consists of 50 States and the District of Columbia. The capital is Washington, District of Columbia; the largest city by population is New York. Your choice is so diverse that a trip that crosses through a few states is a wonderful opportunity to experience completely different vibes! Interesting facts about USA Over eight million slices of pizza are served in the USA every day It was once illegal to serve cherry pie with ice cream in Kansas -In 1905 cherry pie was seen as far too indulgent! According to the World Giving Index, the United States is the most generous country in the world in terms of charitable donations and hours of volunteer work.