1, new york: Being the world's largest city, metropolis and commercial port, it is not only the financial center of the United States, but also the largest financial center in the world. New york is located at the Hudson River mouth of the Northeast Station of the United States, bordering the Atlantic Ocean. New york is also the headquarters of the United Nations, located on the east bank of Manhattan Island.

2. Washington: Washington, the capital of the United States in Maryland and Virginia, is one of the cultural centers of the United States. There are nine institutions of higher learning in the city, including Georgetown University and George Washington University. There are many famous museums in Washington, such as National Art Museum, Natural History Museum and Aerospace Museum.

3. San Francisco: the earliest developed metropolis in the western United States. It is the place where early China people lived, so it is also called "big port". San Francisco is one of the best holiday paradise for China people. The scenery in San Francisco is pleasing to the eye, the food is amazing and the hotel is beyond imagination. In the metropolis of San Francisco, you can see the imaginary American scenery.