In December 2017, there weren't many people on the streets of Philadelphia on Christmas Eve in the United States, and there were few tourists. Walking on the streets of Philadelphia is a bit boring. Seeing the Philadelphia Museum at the corner of the street, think of a place to sit down and have a rest. Entering the empty Philadelphia Museum, I got bored and looked around. I saw a list of American history. By the way, I learned American history. It's also an extra surprise to improve myself.