As the only World Heritage city in the history of the United States, Philadelphia is the place where the American dream began. Located in the middle of the economic center of New York and the political center of Washington, there is neither the prosperity of New York nor the orthodoxy of Washington, but it is the real birthplace of the United States. Among the many landmarks, the United States in the Independence Palace, looking for a table to draft an Declaration of Independence to talk about the Independence Palace, as the name suggests, the United States is therefore independent. Originally built in the Pennsylvania State Capitol nearly 300 years ago, it became the site of the continent's first 13 states. Jackson drafted the Declaration of Independence here, and Washington here announced that the United States has become an independent country from the United Kingdom. When the people of the world follow the guides, one by one into the room where the history happened, and when the lecturer excitedly displayed the tables and chairs and the Declaration of Independence that were untouched in the past, the tourists seemed to cross the history and be there. . The independence of the United States is not achieved overnight, but the Independence Palace is the beginning of independence.